The embodiments of the present disclosure disclose an adaptive communication system, communication method, communication terminal and Access Point (AP). The system includes: an application mode information obtaining module, configured to obtain information about the application mode supported by the network; and an AP, configured to: provide a communication terminal with application mode information obtained by the application mode information obtaining module, wherein the application mode information indicates the application mode supported by the network; and create a communication connection with the communication terminal based on the application mode negotiated and determined according to the information about the application mode supported by the communication terminal and the information about the application mode supported by the network. The embodiments of the present disclosure may make the most of the access resources, improve the success ratio of access, and reduce unnecessary delay and power consumption.