In this study, we have lead the method to solve the problem with arranging lecture-rooms by using Genetic Algorithm with the functions, that we have derived to arrange classes to suitable lecture rooms and in right time schedule in another study. We simulated the problem with 874 lectures that should be placed in 68 rooms into three cases. In the first case, the purpose is to decrease the number of lecture rooms. In the second case, the purpose is to change the unused lecture rooms into properly used ones retaining the total area of lecture rooms. In the third case, the purpose is to change the unused rooms to used ones maintaining the total number of lecture rooms. In all cases, frequency in use of each lecture rooms could be increased, and the number of lecture rooms, which are essential to operate all lectures, could be decreased by our method.
