A robot fusion navigation system based on a map without a map is introduced. The A* algorithm is used for global planning, and the DWA algorithm is used for self-adaptation and dynamically adjust the navigation route. Experiments show that the fusion navigation system has higher scene adaptability and can complete navigation more efficiently. The new navigation mode of integrated navigation without map and map is introduced in detail. Can be more dynamic and flexible to complete navigation tasks on unknown map terrain. This project can automatically switch the behavior mode between the known and unknown map navigation. The A* algorithm is mainly used for global planning in areas with maps, two-dimensional radar scanning in unknown areas[1], real-time feedback of map roadblocks, and improved DWA algorithm for self-adaptation, dynamically planning routes, and providing the most efficient navigation route.