A method for switching a battery power saving mode in a mobile terminal comprising: analyzing at least a battery level or a usage pattern of the terminal; activating a power saving mode according to the analyzed battery level or usage pattern; displaying a menu, on a display, for setting at least one power saving item of the mobile terminal when the power saving mode is activated; receiving only text without an attachment when an e-mail is received in the power saving mode and the sender who sent the corresponding e-mail is not stored in a phonebook of the mobile terminal and does not belong to a specific group of the mobile terminal; and postponing receiving the attachment to after the release of the power saving mode; receiving text and attachment when an e-mail is received in the power saving mode and the sender who sent the corresponding e-mail is stored in the phonebook of the mobile terminal or belongs to a specific group of the mobile terminal; controlling a processing or displaying of an event or content in the activated power saving mode; and deactivating the power saving mode in response to a lapse of a specific period of time, releasing a screen lock, or generating an alarm, wherein: the power saving mode is activated based on the usage pattern when the battery level reaches a first level; the power saving mode is activated automatically when the battery level reaches a second level that is lower than the first level; and the usage pattern includes at least a battery usage pattern, a call pattern, a messaging pattern, a location of the mobile terminal, a set time of a specific mode, or a schedule. analyzing at least a battery level or a usage pattern of the terminal; activating a power saving mode according to the analyzed battery level or usage pattern; displaying a menu, on a display, for setting at least one power saving item of the mobile terminal when the power saving mode is activated; receiving only text without an attachment when an e-mail is received in the power saving mode and the sender who sent the corresponding e-mail is not stored in a phonebook of the mobile terminal and does not belong to a specific group of the mobile terminal; and postponing receiving the attachment to after the release of the power saving mode; receiving text and attachment when an e-mail is received in the power saving mode and the sender who sent the corresponding e-mail is stored in the phonebook of the mobile terminal or belongs to a specific group of the mobile terminal; controlling a processing or displaying of an event or content in the activated power saving mode; and deactivating the power saving mode in response to a lapse of a specific period of time, releasing a screen lock, or generating an alarm, wherein: the power saving mode is activated based on the usage pattern when the battery level reaches a first level; the power saving mode is activated automatically when the battery level reaches a second level that is lower than the first level; and the usage pattern includes at least a battery usage pattern, a call pattern, a messaging pattern, a location of the mobile terminal, a set time of a specific mode, or a schedule. the power saving mode is activated based on the usage pattern when the battery level reaches a first level; the power saving mode is activated automatically when the battery level reaches a second level that is lower than the first level; and the usage pattern includes at least a battery usage pattern, a call pattern, a messaging pattern, a location of the mobile terminal, a set time of a specific mode, or a schedule. <EOS>