In order to implement object-controllability and ahead control of automatic generation control（AGC）， a new method of frequency bias coefficient setting is proposed based on the multi-target optimum technology and super-short-term load forecasting（SSTLF）. In the algorithm， control factors are introduced by applying evaluation function methods. So it can control every object’s importance artificially according to the intention of decision-makers. Using the results of SSTLF and running this algorithmic program before every forecast period， each area can achieve object-controllable and ahead frequency bias coefficients are calculated to make the system reach the anticipant objectives better. Finally studies on a digital simulation model of three-area power system demonstrate the validity of the proposed algorithm.