The invention belongs to the technical field of combustion gas turbine test equipment and especially relates to a land test stand system for a large and medium-sized combustion gas turbine. The system includes a test zone, a switching room and a debugging and operation room. The test zone covers a combustion gas turbine body, a test stand frame, a gas inlet device, a gas exhaust device, an ejection device, a fuel oil skid, a lubrication oil skid, a compressed air system, a hydraulic dynamometer and a circulating water system. The switching room is therein equipped with a DC power box and an AC power distribution box supplying power for monitoring devices, fire control devices and other devices separately. The debugging and operation room is therein provided with a monitoring control table comprising an operation control assembly, a lubrication oil control assembly, a combustion oil control assembly, an air control assembly, a water system control assembly and a remote video assembly and the like. The test stand system provided by the invention is complete in structure, complete in sub systems, reasonable in layout, and has advantages of high automation degree, low human resource input, low health damage and the like.