The invention relates to a nozzle-replaceable constant-temperature cleaning pot with a humidity monitoring function. The nozzle-replaceable constant-temperature cleaning pot comprises a top cover with threads, a switch key, a lifting handle, a power line, a constant-temperature module circuit board, a stainless steel heating plate, a nozzle, a spout, a power light, a hygrometer and a rapid connector. The top cover with the threads is installed at the top of a cleaning pot body, the switch key is installed on the lifting handle in an embedded mode, the lifting handle and the cleaning pot body are formed in an integrated mode, the stainless steel heating plate is installed in the cleaning pot body and connected to the constant-temperature module circuit board through a wire, the constant-temperature module circuit board is embedded into the cleaning pot body, the power line is connected with the constant-temperature module circuit board, the power light is installed on the cleaning pot body in an embedded mode, the hygrometer is installed on the side face of the cleaning pot body, the nozzle is installed on the rapid connector, and the rapid connector and the constant-temperature cleaning pot are designed in an integrated mode. When the nozzle-replaceable constant-temperature cleaning pot is in use, water usage is saved, and the cleaning pot is low in cleaning cost, convenient to use, good in cleaning effect and adjustable in temperature.