A mobile communication terminal capable of outputting messages sent to or received from a counterpart terminal altogether in chronological order from oldest to newest, which comprises: a key input unit provided with a plurality of alphanumeric keys, a send key, an end key and other function keys for dialing, selecting a menu or inputting a request, and serving as a data input means for selecting a text message integrated management mode and activating a text message editor to input a text message and to select and store message transmission settings; a display unit for displaying the operational status of the mobile communication terminal, including radio signal strength, battery charge level and current date/time, and displaying a user interface for entering the text message integrated management mode, outputting the messages sent to or received from, in compliance with a short message service protocol, the counterpart terminal altogether and inputting the message transmission settings; a memory having a text message integrated management program that enables a user to input and store a text message and message transmission settings, including a sender and at least one recipient, using the text message editor in the text message integrated management mode and to send the inputted text message to the at least one recipient, and that outputs messages sent to or received from the at least one recipient altogether in chronological order when a reply text message is received from the at least one recipient and added to a list of received messages stored in a message inbox, wherein said list of received messages includes phone numbers or integrated management group names (302, 312) which the user inputs, and the sending and receiving of text messages is performed in compliance with the SMS protocol, wherein the text message integrated management program enables the user to input a text message and message transmission settings at the same time; and a microprocessor for controlling the mobile communication terminal to process data transmission or reception according to a defined communication protocol, implementing the text message integrated management program stored in the memory so as to output an integrated history of messages sent to or received from the counterpart terminal. a key input unit provided with a plurality of alphanumeric keys, a send key, an end key and other function keys for dialing, selecting a menu or inputting a request, and serving as a data input means for selecting a text message integrated management mode and activating a text message editor to input a text message and to select and store message transmission settings; a display unit for displaying the operational status of the mobile communication terminal, including radio signal strength, battery charge level and current date/time, and displaying a user interface for entering the text message integrated management mode, outputting the messages sent to or received from, in compliance with a short message service protocol, the counterpart terminal altogether and inputting the message transmission settings; a memory having a text message integrated management program that enables a user to input and store a text message and message transmission settings, including a sender and at least one recipient, using the text message editor in the text message integrated management mode and to send the inputted text message to the at least one recipient, and that outputs messages sent to or received from the at least one recipient altogether in chronological order when a reply text message is received from the at least one recipient and added to a list of received messages stored in a message inbox, wherein said list of received messages includes phone numbers or integrated management group names (302, 312) which the user inputs, and the sending and receiving of text messages is performed in compliance with the SMS protocol, wherein the text message integrated management program enables the user to input a text message and message transmission settings at the same time; and a microprocessor for controlling the mobile communication terminal to process data transmission or reception according to a defined communication protocol, implementing the text message integrated management program stored in the memory so as to output an integrated history of messages sent to or received from the counterpart terminal.