In order to evaluate the performance of wireless communication system under idiographic application environment, put forwards a new calculation algorithm of communication distance and speed with wireless communication system based on FLR9G30 module. Building a communication system based on FLR9G30 in certain idiographic application environment, uses Okumra-Hata model to calculate the Communication Distance and Speed of application environment, and reach a conclusion that the communication system maximum date transmission speed is 36 Mbps. Simulation result shows that the method can offer theory reference for calculation the communication distance and speed with wireless communication system based on FLR9G30 module under complex environment.