A moment frame system for construction is disclosed. The moment frame system for construction includes a plurality of prestressed concrete (PC) girders arranged in a horizontal direction; a plurality of PC columns arranged in a vertical direction; a plurality of main connection modules connecting the PC girders and the PC columns to be intercrossed in the center of the PC girders arranged in a cross form; and a plurality of sub connection modules connecting the PC girders and the PC columns to be intercrossed in a position except for the main connection module.
