The utility model discloses an indoor track type intelligent inspection robot system based on a combined track. The indoor track type intelligent inspection robot system includes the combined track and a robot body, the robot body includes a driving system, a detection assembly, a holder, a synchronous belt system, a moving platform, and a control system, the control system is fixed on the moving platform, the holder is fixed at the upper end of the moving platform, the detection assembly is fixed to the holder, the synchronous belt system is fixedly connected with the combined track, the driving system is fixed on the moving platform, the moving platform is arranged on the combined track, and the driving system supplies power to make a robot to move along the combined track. The combined track is a wall-hanging type combined track, so that the position transfer in two or more vertical planes can be realized, the combination meets the diversified and complex detection requirements of indoor equipment, and a horizontal track or a vertical track can be independently taken out to built a detection robot system according to the actual detection needs.