In this paper, we design a reasoning game based on augmented reality technology, and try to make the user feel the real sense of presence and the sense of reality during the game. Based on the virtual crime story, there is one victim and three suspects, and the user can reason about the incident by grasping the relationship between them. Each room of the suspects is made in the form of drawings, and the room containing the evidence of the suspects is displayed in 3D form by recognizing the drawings, where they acquire and combine the evidence. In addition to the evidence shown in the drawings, clues in furniture or objects that make up the actual room should also be searched. The two safes in the crime scene contain the necessary evidence and items to control the game through the Arduino and UDP communications. Within the time limit, you need to combine the clues necessary for the actual reasoning, and finally, you have to guess three things: the actual case, the date of the case, and the criminal tool. Users can enjoy games that cross the augmented reality and real space while directly intervening in case resolution from a third party.