Embodiments provide a status detection method, an apparatus, and a system. The method includes receiving, by a wireless network entity, a detection registration request message sent by UE or a server corresponding to a client in UE, where the detection registration request message is used to request to register status detection with the wireless network entity, and the status detection includes at least one of online detection or update detection; completing, by the wireless network entity, registration of the status detection according to the detection registration request message; and performing, by the wireless network entity, the status detection. The method also includes sending a result of the status detection.