An Internet access control method in a mobile communication terminal with a built-in web browser. Upon receipt of an Internet access request from a user, the mobile communication terminal accesses a web server through an Internet, downloads a web document from the web server, and displays the downloaded web document. Upon receipt of a data input from the user while displaying the web document, the mobile communication terminal performs an operation according to the data input. Otherwise, upon failure to receive any web command from the user for a predetermined time after displaying the web document, the mobile communication terminal temporarily releases an access to the Internet. In the meantime, the mobile communication terminal resumes an access to the Internet upon receipt of a web command from the user.