Abstract: In order to solve the urgent need for air conditioners in some schools, and the difficulty of purchasing air conditioners in large quantities due to the shortage of funds and the difficulty of line transformation, Our company designed and developed a shared air conditioner. sharing air conditioners can save the school from having to spend a lot of money to buy air conditioners. Our company will provide air conditioners for free, including the wiring transformation and installation in the early stage and the operation and maintenance in the later stage. The school only needs to pay for the use according to the actual situation. The shared air conditioning system uses NB-IoT communication module. Relying on the narrowband Internet of Things of Telecom, the communication data is uploaded to the telecom cloud, and the WeChat small program is connected to the cloud platform to display and control the status of the air conditioning, so as to realize the sharing operation of the air conditioning, such as scanning code lease, surrender lease and centralized control.

Key words: Sharing air conditioning, NB-IoT, Centralized control