The invention discloses a networked measurement and control method and device for a split air conditioner. In the method, each control socket in the networked measurement and control system of a split air conditioner collects the status information of the connected split air conditioner in real time, and sequentially passes the remote intelligent server and the data server timing sent to the remote client; when the user thinks that regulation is needed, the user inputs a regulation instruction on the remote client, and the remote client transmits the regulation instruction to the corresponding control socket through the remote intelligent server and the power line, and the controller in the control socket adjusts according to the Instructions and corresponding control code values are used to control the connected split air conditioner. The device includes several control sockets, power lines, remote intelligent server, data server and remote client. The invention can realize the remote real-time measurement and control and energy-saving supervision of each split air conditioner in public buildings such as schools, institutions, hotels, office buildings, etc. by a remote client through the network.