The utility model relates to the field of humiture monitor equipment and particularly relates to a network humiture monitoring device which adopts a power line network for data transmission. The humiture monitoring device comprises a plurality of measuring units each being in communication connection with a monitor host through the power line network. Each measuring unit is provided with an independent communication address. A digital integrated humiture sensor is adopted. Measurement and correction of humiture are achieved. A power line communication modem is arranged. Data transmission is carried out through the power line network. Each measuring unit is also provided with a control circuit, is connected with a blower fan and a dehumidifying device, and controls the operation of the blower fan and the dehumidifying device. According to the humiture monitoring device, the power line network is utilized for data transmission, on-site tedious cable wiring is not required, a system circuit is simplified, and the cost is reduced.