The utility model relates to a detection system of a tobacco curing state for a bulk curing barn, and belongs to a detection device. The detection system comprises a heating chamber and a curing chamber, and also comprises a tobacco curing state detection device, wherein the tobacco curing state detection device comprises a camera, a tobacco moisture meter, a master controller and a computer terminal, and the camera is arranged inside the curing chamber and is connected with the computer terminal through a signal transmission line; and the tobacco moisture meter is a needle type meter, is arranged inside the curing chamber and is fixedly arranged on a push rod of a cylinder, and the inserting end of the tobacco moisture meter is close to tobacco; and the tobacco moisture meter is connected with the compute terminal through a signal transmission line. According to the detection system, the tobacco curing state can be monitored in real time, the temperature and humidity states which have an important impact on the tobacco curing effect in the curing chamber are precisely controlled, so that the good curing effect can be realized, and meanwhile, the human workload is reduced, the efficiency is improved, the remote monitoring is realized, and the technical support problems of remote curing barns at tobacco-growing areas are solved.