1. A method for autonomous detecting and positioning of indoor wireless network faults of one or more wireless networks, the method comprising: building an indoor three-dimensional spatial structural model and an indoor transmitting antenna model of a target building, calculating, in the indoor three-dimensional spatial structural model, a signal strength of the indoor transmitting antenna model inside the target building according to a ray-tracing propagation model algorithm to accordingly determine one or more key testing positions of the target building, deploying one or more connection testing wireless units, each connection testing wireless unit having an automatic connection testing function, at the key testing positions of indoor wireless networks and starting the connection testing wireless units when the one or more wireless networks are idle, counting on-states of the connection testing wireless units, collecting measurement reports reported by the connection testing wireless units, and determining the indoor wireless network faults of the one or more wireless networks and associated devices according to the on-states of the connection testing wireless units and the measurement reports reported by the connection testing wireless units.