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diff --git a/negotiation_agent/action_space.py b/negotiation_agent/action_space.py
new file mode 100644
index 0000000..6585d9c
--- /dev/null
+++ b/negotiation_agent/action_space.py
@@ -0,0 +1,107 @@
+from dataclasses import dataclass
+from typing import Dict, List, Optional
+import json
+import os
+from pathlib import Path
+
+
+@dataclass
+class ActionInfo:
+    id: int
+    name: str
+    description: str
+    category: str
+    strength: str
+
+    def __str__(self) -> str:
+        return f"{self.description} (ID: {self.id}, Category: {self.category}, Strength: {self.strength})"
+
+
+class ActionSpace:
+    def __init__(self, config_path: Optional[str] = None):
+        if config_path is None:
+            config_path = os.path.join(
+                Path(__file__).parent.parent, "configs", "actions.json"
+            )
+        self._actions: Dict[int, ActionInfo] = {}
+        self._load_actions(config_path)
+
+    def _load_actions(self, config_path: str) -> None:
+        """JSON 파일에서 액션 정보를 로드합니다."""
+        with open(config_path, "r", encoding="utf-8") as f:
+            data = json.load(f)
+
+        for action in data["actions"]:
+            self.add_action(
+                id=action["id"],
+                name=action["name"],
+                description=action["description"],
+                category=action["category"],
+                strength=action["strength"],
+            )
+
+    def add_action(
+        self, id: int, name: str, description: str, category: str, strength: str
+    ) -> None:
+        """새로운 액션을 추가합니다."""
+        if id in self._actions:
+            raise ValueError(f"Action with id {id} already exists")
+
+        self._actions[id] = ActionInfo(
+            id=id,
+            name=name,
+            description=description,
+            category=category,
+            strength=strength,
+        )
+
+    def remove_action(self, action_id: int) -> None:
+        """지정된 ID의 액션을 제거합니다."""
+        if action_id not in self._actions:
+            raise ValueError(f"Action with id {action_id} does not exist")
+        del self._actions[action_id]
+
+    def get_action(self, action_id: int) -> ActionInfo:
+        """액션 ID로 액션 정보를 조회합니다."""
+        if action_id not in self._actions:
+            raise ValueError(f"Invalid action id: {action_id}")
+        return self._actions[action_id]
+
+    def get_actions_by_category(self, category: str) -> List[ActionInfo]:
+        """특정 카테고리의 모든 액션을 반환합니다."""
+        return [
+            action for action in self._actions.values() if action.category == category
+        ]
+
+    def get_actions_by_strength(self, strength: str) -> List[ActionInfo]:
+        """특정 강도의 모든 액션을 반환합니다."""
+        return [
+            action for action in self._actions.values() if action.strength == strength
+        ]
+
+    def save_actions(self, file_path: str) -> None:
+        """현재 액션 설정을 JSON 파일로 저장합니다."""
+        data = {
+            "actions": [
+                {
+                    "id": action.id,
+                    "name": action.name,
+                    "description": action.description,
+                    "category": action.category,
+                    "strength": action.strength,
+                }
+                for action in self._actions.values()
+            ]
+        }
+
+        with open(file_path, "w", encoding="utf-8") as f:
+            json.dump(data, f, ensure_ascii=False, indent=4)
+
+    @property
+    def action_space_size(self) -> int:
+        """현재 액션 공간의 크기를 반환합니다."""
+        return len(self._actions)
+
+    def list_actions(self) -> List[ActionInfo]:
+        """모든 액션 정보를 리스트로 반환합니다."""
+        return list(self._actions.values())
diff --git a/negotiation_agent/constants.py b/negotiation_agent/constants.py
new file mode 100644
index 0000000..208e7f4
--- /dev/null
+++ b/negotiation_agent/constants.py
@@ -0,0 +1,41 @@
+from gymnasium import spaces
+
+# Observation Space Constants
+SCENARIO_SPACE_SIZE = 4  # 시나리오 상태 수 (0-3)
+PRICE_ZONE_SIZE = 3  # 가격 구간 수 (0-2)
+ACCEPTANCE_RATE_SIZE = 3  # 수락률 레벨 수 (0-2)
+
+# Observation Space Mappings
+SCENARIO_MAPPING = {
+    0: "높은 구매 의지",
+    1: "중간 구매 의지",
+    2: "낮은 구매 의지",
+    3: "매우 낮은 구매 의지",
+}
+
+PRICE_ZONE_MAPPING = {0: "목표가격 이하", 1: "목표가격~임계가격", 2: "임계가격 초과"}
+
+ACCEPTANCE_RATE_MAPPING = {0: "낮음 (<10%)", 1: "중간 (10-25%)", 2: "높음 (>25%)"}
+
+# Action Space Constants
+ACTION_SPACE_SIZE = 9
+
+# Action Space Mappings
+ACTION_MAPPING = {
+    0: "강한 수락",
+    1: "중간 수락",
+    2: "약한 수락",
+    3: "강한 거절",
+    4: "중간 거절",
+    5: "약한 거절",
+    6: "강한 가격 제안",
+    7: "중간 가격 제안",
+    8: "약한 가격 제안",
+}
+
+# Spaces Definition
+OBSERVATION_SPACE = spaces.MultiDiscrete(
+    [SCENARIO_SPACE_SIZE, PRICE_ZONE_SIZE, ACCEPTANCE_RATE_SIZE]
+)
+
+ACTION_SPACE = spaces.Discrete(ACTION_SPACE_SIZE)
diff --git a/negotiation_agent/environment.py b/negotiation_agent/environment.py
index cbc7bc3..4ab3f23 100644
--- a/negotiation_agent/environment.py
+++ b/negotiation_agent/environment.py
@@ -1,6 +1,13 @@
 import gymnasium as gym
 from gymnasium import spaces
 import numpy as np
+from negotiation_agent.spaces import (
+    NegotiationSpaces,
+    State,
+    PriceZone,
+    AcceptanceRate,
+    Scenario,
+)
 
 
 class NegotiationEnv(gym.Env):
@@ -8,9 +15,11 @@ class NegotiationEnv(gym.Env):
 
     def __init__(self, scenario=0, target_price=100, threshold_price=120):
         super(NegotiationEnv, self).__init__()
-        self.observation_space = spaces.MultiDiscrete([4, 3, 3])
-        self.action_space = spaces.Discrete(9)
-        self.initial_scenario = scenario
+
+        self.spaces = NegotiationSpaces()
+        self.observation_space = self.spaces.observation_space
+        self.action_space = self.spaces.action_space
+        self.initial_scenario = Scenario(scenario)
         self.target_price = target_price
         self.threshold_price = threshold_price
         self.current_price = None
@@ -20,23 +29,28 @@ class NegotiationEnv(gym.Env):
     def _get_state(self):
         """현재 정보를 바탕으로 State 배열을 계산"""
         if self.current_price <= self.target_price:
-            price_zone = 0
+            price_zone = PriceZone.BELOW_TARGET
         elif self.target_price < self.current_price <= self.threshold_price:
-            price_zone = 1
+            price_zone = PriceZone.BETWEEN_TARGET_AND_THRESHOLD
         else:
-            price_zone = 2
+            price_zone = PriceZone.ABOVE_THRESHOLD
 
         acceptance_rate_val = (
             self.initial_price - self.current_price
         ) / self.initial_price
         if acceptance_rate_val < 0.1:
-            acceptance_rate_level = 0
+            acceptance_rate_level = AcceptanceRate.LOW
         elif 0.1 <= acceptance_rate_val < 0.25:
-            acceptance_rate_level = 1
+            acceptance_rate_level = AcceptanceRate.MEDIUM
         else:
-            acceptance_rate_level = 2
+            acceptance_rate_level = AcceptanceRate.HIGH
 
-        return np.array([self.initial_scenario, price_zone, acceptance_rate_level])
+        state = State(
+            scenario=self.initial_scenario,
+            price_zone=price_zone,
+            acceptance_rate=acceptance_rate_level,
+        )
+        return np.array(state.to_array())
 
     def reset(self, seed=None, options=None):
         """환경을 초기 상태로 리셋"""
diff --git a/negotiation_agent/spaces.py b/negotiation_agent/spaces.py
new file mode 100644
index 0000000..15f5a1a
--- /dev/null
+++ b/negotiation_agent/spaces.py
@@ -0,0 +1,113 @@
+from gymnasium import spaces
+from typing import Dict, List, Any
+from dataclasses import dataclass
+from enum import Enum, auto
+from negotiation_agent.action_space import ActionSpace, ActionInfo
+
+
+class Scenario(Enum):
+    HIGH_INTENTION = 0
+    MEDIUM_INTENTION = 1
+    LOW_INTENTION = 2
+    VERY_LOW_INTENTION = 3
+
+    @property
+    def description(self) -> str:
+        return {
+            self.HIGH_INTENTION: "높은 구매 의지",
+            self.MEDIUM_INTENTION: "중간 구매 의지",
+            self.LOW_INTENTION: "낮은 구매 의지",
+            self.VERY_LOW_INTENTION: "매우 낮은 구매 의지",
+        }[self]
+
+
+class PriceZone(Enum):
+    BELOW_TARGET = 0
+    BETWEEN_TARGET_AND_THRESHOLD = 1
+    ABOVE_THRESHOLD = 2
+
+    @property
+    def description(self) -> str:
+        return {
+            self.BELOW_TARGET: "목표가격 이하",
+            self.BETWEEN_TARGET_AND_THRESHOLD: "목표가격~임계가격",
+            self.ABOVE_THRESHOLD: "임계가격 초과",
+        }[self]
+
+
+class AcceptanceRate(Enum):
+    LOW = 0
+    MEDIUM = 1
+    HIGH = 2
+
+    @property
+    def description(self) -> str:
+        return {
+            self.LOW: "낮음 (<10%)",
+            self.MEDIUM: "중간 (10-25%)",
+            self.HIGH: "높음 (>25%)",
+        }[self]
+
+
+@dataclass
+class State:
+    scenario: Scenario
+    price_zone: PriceZone
+    acceptance_rate: AcceptanceRate
+
+    def to_array(self) -> List[int]:
+        return [self.scenario.value, self.price_zone.value, self.acceptance_rate.value]
+
+    @classmethod
+    def from_array(cls, arr: List[int]) -> "State":
+        return cls(
+            scenario=Scenario(arr[0]),
+            price_zone=PriceZone(arr[1]),
+            acceptance_rate=AcceptanceRate(arr[2]),
+        )
+
+    def __str__(self) -> str:
+        return (
+            f"State(scenario={self.scenario.description}, "
+            f"price_zone={self.price_zone.description}, "
+            f"acceptance_rate={self.acceptance_rate.description})"
+        )
+
+
+class NegotiationSpaces:
+    def __init__(self):
+        self._action_space = ActionSpace()
+
+    @property
+    def observation_space(self) -> spaces.MultiDiscrete:
+        return spaces.MultiDiscrete(
+            [len(Scenario), len(PriceZone), len(AcceptanceRate)]
+        )
+
+    @property
+    def action_space(self) -> spaces.Discrete:
+        return spaces.Discrete(self._action_space.action_space_size)
+
+    def decode_action(self, action_id: int) -> ActionInfo:
+        return self._action_space.get_action(action_id)
+
+    def encode_state(self, state: State) -> List[int]:
+        return state.to_array()
+
+    def decode_state(self, state_array: List[int]) -> State:
+        return State.from_array(state_array)
+
+    def get_action_description(self, action_id: int) -> str:
+        return self.decode_action(action_id).description
+
+    def get_state_description(self, state_array: List[int]) -> str:
+        return str(self.decode_state(state_array))
+
+    def get_actions_by_category(self, category: str) -> List[ActionInfo]:
+        return self._action_space.get_actions_by_category(category)
+
+    def get_actions_by_strength(self, strength: str) -> List[ActionInfo]:
+        return self._action_space.get_actions_by_strength(strength)
+
+    def list_all_actions(self) -> List[ActionInfo]:
+        return self._action_space.list_actions()