A method of connection and data transfer between at least one base station managing device and a network management center of a radio communications system comprises the steps of: (a) gathering data in accordance with formats required by the network management center at the at least one base station managing device; (b) generating a process of a corresponding format at the base station managing device; (c) notifying identification information of the process generated at the at least one base station managing device; (d) driving a subprocess according to the process identification information at the at least one base station managing device; and (e) transmitting the corresponding formatted data to the network management center.