The present invention relates to a method for controlling a structural member design considering constructability of formwork, comprising: an initial input step S10 wherein drawing information including structural member information is inputted from an input unit; a recognition step S20 wherein space information and structural members are recognized from the drawing information; a space partitioning step S30 wherein arrangement spaces in which previously set standard forms are arranged are determined; a form arrangement step S40 wherein the previously set standard forms are virtually arranged; a coordinate determination step S50 wherein the coordinate positions of the previously set standard forms are recognized; and an optimization step S60 wherein the variable information of the structural members is changed.