Provided are an integrated authentication processing apparatus for personal mobility in a wired/wireless integrated service network, a method thereof, and a computer-readable recording medium for recording a program that implements the method. The integrated authentication processing method includes the steps of: a) receiving a network service subscription request from a user through the Internet, registering the user as a service subscriber, and storing/managing subscription information of the subscriber; b) receiving the network access request from a user terminal through a network control platform, processing an integrated authentication for network access and additional services, and transmitting the result to the user terminal through the network control platform; and c) processing a charge information process request from the user terminal whose access is allowed according to the authentication result of the step b) by using charge information and session information of the subscriber without additional authentication process.