There are several problems in network connection between mobile terminal and intelligent hardware. For examples，the intelligent hardware is too complex on structure，programming a specific software is low-efficiency and set up a specific server is too expensive，etc. By connecting the intelligent hardware to the China Mobile IOT Open Platform can solve those problems，also the IOT of wide area can be set up easily. The solutiondescribe in this paper is based on cloud server of China Mobile IOT Open Platform(i. e. OneNet cloud server) and sensor data acquisition module. The data collected by sensors can be transmitted to the OneNet cloud server，whichcan storage and switch the data，so that the IOT of mobile terminal-cloud server-intelligent hardware is set up. The IOT based on OneNet cloud server can reduce the development difficulty，Lower development costs and shorten the development cycle. The mobile terminal can monitor the data and status of the intelligent hardware，also you can check them on the web by access to China Mobile IOT Open Platform.