Group communication service providing method, system and computer-readable medium

A system for providing a group communication service implemented by a service server for performing data communication with a manager terminal and a user terminal, the system comprising:

• a first group setting unit of setting a first group by providing an interface for receiving group member information from a manager terminal and setting a member classification item;
• a second group setting unit of setting a second group by providing an interface for providing a clustered information on the basis of the member classification item based on information on the first group and receiving a manager input for the clustered information;
• and
• a message sending unit of receiving message information sent according to an input of a manager terminal and sending a message to a user terminal belonging to the second group,
• wherein the user terminal can check the message with a dedicated application by installing the dedicated application for the group communication service even if the user terminal is not a member of the service server.