A method and an apparatus for controlling data usage of a mobile terminal. The method includes checking a plurality of web contents contained in a web page in a web browser executing mode. The method also includes selectively downloading at least one of the checked web contents when data usage for a preset period exceeds a data usage limit. The method further includes displaying the at least one downloaded web content. The apparatus performs the method. Without periodic control of data usage by a user, the data usage of a mobile terminal is automatically controlled.