With the development of information technology, the Smart home element with information electronic devices has found its way and adapted into daily life. However, the diversity of communication mode between different equipment has made it complicated to make new device accessible to Smart home. In another words, the scalability of Smart home is low. Generally, the cost of extension is expensive. The article aims at the electronical devices with different wireless communication mode, and proposes an approach of hardware adaption to form the adapter node with single chip based on WiFi and STM32. It is easy to add adapter node to control server and manage it. Moreover, it is convenient to adapt other communication mode. The method presents the design of adapter node as well as internal programs. Finally, we have adopted this method to realize a node management and controlling server. Experiment shows that the system of adapter node is stable and easy to be expanded.