A detection system, comprising multiple passive wireless sensors (1), which are respectively provided on corresponding positions to be detected and used for obtaining detection signals of the positions to be detected; a leaky coaxial cable (2), which is provided along the positions to be detected and can transmit electromagnetic waves to drive the multiple passive wireless sensors and receive the detection signals sent by the passive wireless sensors. According to the detection system, mounting a frame can be saved, and there is no need to replace a battery regularly, so as to simplify maintenance costs; when performing multi-point measurement, the costs are reduced and the number of passive wireless sensors that are configurable in the system is increased. Also disclosed is a wind driven generator.