The utility model discloses a natural gas logging volume system diagnosis controller belongs to equipment performance diagnosis technical field. Specifically include: the casing sets up in inside PCBcircuit board (1) of casing to and set up central controller (2) on PCB circuit board (1), check standard signal generator (3) and standard signal measured module (4), checking the input of standard signal generator (3) and being connected with central controller (2) electricity, the output of checking standard signal generator (3) is arranged in being connected with the isolator electricity of natural gas logging volume system, the input of standard signal measured module (4) is used for measuring electric connection of flow computer of system with natural gas logging, and the output and central controller (2) the electricity of standard signal measured module (4) are connected. This diagnostic control ware simple structure, it is easy and simple to handle, be applied to this diagnostic control ware the diagnosis of natural gas logging volume system, can simplify greatly and carry out diagnostic operation, reduce cost to natural gas logging volume system.