diff --git a/Server/src/server.cpp b/Server/src/server.cpp
index c089d07..3ffe3fc 100644
--- a/Server/src/server.cpp
+++ b/Server/src/server.cpp
@@ -10,6 +10,7 @@
 #include "utils/snowflake.h"
 #include "utils/utils.h"
 #include "vulkan_engine/asset/object/model.h"
+#include "vulkan_engine/vulkan/physics.h"
 
 #define LISTENIP "::"
 #define LISTENPORT 9010
@@ -46,9 +47,12 @@ void EchoClient(utils::ThreadPool* tp, Network::IOCP* iocp,
 
       std::lock_guard lock(MODELS_MUTEX);
       auto ID = model.ID;
-      if (MODELS.find(ID) == MODELS.end())
+      if (MODELS.find(ID) == MODELS.end()) {
         spdlog::info("model received: {}:{}", model.name, ID.snowflake);
-      MODELS[ID] = std::move(model);
+        MODELS[ID] = std::move(model);
+      } else {
+        MODELS[ID].Deserialize(recv_data);
+      }
       MODELS[ID].needsUpdate = true;
     } break;
     default:
@@ -112,6 +116,7 @@ void ClientRefresher(utils::ThreadPool* tp, Network::IOCP* iocp) {
   for (auto& model : MODELS) {
     if (model.second.name == "camera_lag") continue;
     model.second.Update(delta_time);
+    veng::Physics::invokeOnColisionEvent(tp, MODELS);
     for (auto& client : CLIENTS) {
       if (client->sock == 0) continue;
       std::vector<char> send_data;
diff --git a/impl/vulkan_engine/vulkan/physics.cpp b/impl/vulkan_engine/vulkan/physics.cpp
index 91b5863..c974b57 100644
--- a/impl/vulkan_engine/vulkan/physics.cpp
+++ b/impl/vulkan_engine/vulkan/physics.cpp
@@ -36,10 +36,44 @@ void Physics::invokeOnColisionEvent(
   }
 }
 
+void Physics::invokeOnColisionEvent(
+    gsl::not_null<utils::ThreadPool*> thread_pool,
+    std::unordered_map<utils::Snowflake, Model>& models) {
+  constexpr std::float_t EPSILON = std::numeric_limits<std::float_t>::epsilon();
+
+  for (std::unordered_map<utils::Snowflake, Model>::iterator
+           iter_A = models.begin();
+       iter_A != models.end(); iter_A++) {
+    for (auto iter_B = std::next(iter_A); iter_B != models.end(); iter_B++) {
+      auto& model_A = iter_A->second;
+      std::lock_guard<std::mutex> Alock(model_A.modding);
+      auto& model_B = iter_B->second;
+      std::lock_guard<std::mutex> Block(model_B.modding);
+      if (!model_A.colision || !model_B.colision) continue;
+      std::float_t distance =
+          glm::distance(model_A.position, model_B.position);
+      std::float_t modelA_radius = model_A.radius * model_A.scale.x;
+      std::float_t modelB_radius = model_B.radius * model_B.scale.x;
+      if (distance <= modelA_radius + modelB_radius) {
+        if (model_A.OnColision)
+          thread_pool->enqueueJob(model_A.OnColision,
+                                  std::make_shared<Model>(std::move(model_A)),
+                                  std::make_shared<Model>(std::move(model_B)));
+        /*model_A = iter_A->second;
+        model_B = iter_B->second;*/
+        if (model_B.OnColision)
+          thread_pool->enqueueJob(model_B.OnColision,
+                                  std::make_shared<Model>(std::move(model_B)),
+                                  std::make_shared<Model>(std::move(model_A)));
+      }
+    }
+  }
+}
+
 bool Physics::RayTrace(const glm::vec3& rayOrigin, const glm::vec3& rayDir,
                        const glm::vec3& v0, const glm::vec3& v1,
                        const glm::vec3& v2, std::float_t& outDistance) {
-  const std::float_t EPSILON = std::numeric_limits<std::float_t>::epsilon();
+  constexpr std::float_t EPSILON = std::numeric_limits<std::float_t>::epsilon();
 
   // 삼각형 엣지와 노멀 계산
   glm::vec3 edge1 = v1 - v0;
diff --git a/include/vulkan_engine/vulkan/physics.h b/include/vulkan_engine/vulkan/physics.h
index 8614446..4c3d81f 100644
--- a/include/vulkan_engine/vulkan/physics.h
+++ b/include/vulkan_engine/vulkan/physics.h
@@ -10,6 +10,9 @@ class Physics {
   static void invokeOnColisionEvent(
       gsl::not_null<utils::ThreadPool*> thread_pool,
       std::unordered_map<std::string, std::shared_ptr<Model>>& models);
+  static void invokeOnColisionEvent(
+      gsl::not_null<utils::ThreadPool*> thread_pool,
+      std::unordered_map<utils::Snowflake, Model>& models);
 
   bool RayTrace(const glm::vec3& rayOrigin, const glm::vec3& rayDir,
                 const glm::vec3& v0, const glm::vec3& v1, const glm::vec3& v2,