The invention discloses an inspection well environment monitoring method, equipment and system based on a low-power-consumption wide area network. Whether an environment parameter currently sampled by a sensor is far away from an early warning threshold is judged, when the environment parameter is far away from the early warning threshold, time for carrying out next sampling is determined according to a strategy that a working life of a battery is prior, and when the environment parameter is close to the early warning threshold, time for carrying out next sampling is determined according to a strategy that safety is prior, and thus, when safety is ensured, the service life of the battery of the inspection well monitoring equipment can be further prolonged.