A method of transmitting management information in wireless local area network system is provided, The method includes transmitting, to a station, a frame including a BSS load in-formation element, the BSS load element including a multi user(MU) multiple input multiple output(MIMO) capable STA count field and a spatial stream utility field, wherein the MUMIMO capable STA count field indicates the total number of STAs with MU reception capability currently associated with the candidate BSS and the Spatial Stream Utility field indicates under utilized spatial streams for busy time of wireless medium.