Method of trading-in application, and market server implementing the same

A method of trading-in applications, comprising:

• receiving, at a user equipment, a first message comprising a list of one or more trade-in target applications from among installed applications and receiving at least one trade-in sale condition;
• transferring a second message comprising return application information of a return application selected from the list;
• and
• receiving a new application selected based on at least the at least one trade-in sale condition.

A server for trading-in applications, comprising:

• a trade-in target manager configured to select at least one trade-in item from a plurality of sale applications and manage the at least one trade-in item and at least one trade-in sale condition;
• a trade-in subscription unit configured to transfer a first message including a list of one or more trade-in target applications and a corresponding one of the at least one trade-in sale condition to the user equipment;
• a trade-in sale manager configured to request deletion of a return application from the user equipment when receiving a second message including return application information of the return application, and configured to transfer a new application associated with the corresponding one of the at least one trade-in sale condition;
• and
• a settling unit configured to process a settlement based on the corresponding one of the at least one trade-in sale condition when the user equipment completes installation of the new application.