Fault reason identification method and device and fault reason identification system

The embodiment of the invention provides a fault reason identification method, a fault reason identification device and a fault reason identification system, which are applied to the technical field of fault analysis. The method comprises the steps: receiving a source data request sent by a service system, wherein the source data request carries an interface address of a third-party system, and the source data request is sent when the service system receives a data request of a fault identification end; requesting source data from the third-party system based on the interface address, and sending the source data to the service system; monitoring whether the service system calls a predetermined feedback component or not, and sending a response result generated based on the source data to the fault identification end; and if so, instructing a predetermined feedback component to feed back the response result, the interface address and the source data to the fault identification end, so that the fault identificat