The invention discloses a land change investigation information management system of three-checking unification. The system comprises a server-side data superposition analysis system, a front-end information management query system and a mobile terminal information acquisition system. The server-side data superposition analysis system processes and analyzes pattern spot information and a land base database, and carries out storage and shares to a server through the front-end information management query system. The mobile terminal information acquisition system downloads data in an on-line mode, carries out real-time positioning and field-operation non-paper information acquisition, and returns to the server. The front-end information management query system is used to realize management and query, uploading and audit, and analysis and statistics of pattern spot data. In the invention, a pattern spot flow function of departments at all levels, in which patrol, investigation and checking are integrated into one body, is realized; a traditional flow is optimized and recombined; whole-course on-line operation of pattern spots is realized; and operating efficiency of investigation work is increased and a great safety meaning of the data is guaranteed.