Abstract: By introducing emotion into the inner released principle based Lorenz hydraulic pressure behavior mechanism,an emotion based behavior selection mechanism is built.The new mechanism resolves default of the original:heterogeneous summation and motive intensity being independent of the current existing circumstances.According to the characteristic that subjective value in economics and emotion in emotion psychology both have evaluating function,behavior eigenfunction is built by referring to prospect theory to obtain the function law of emotion.By making use of the principle that higher emotion is preferred and middle emotion makes behaviors achieved more efficiently,behaviors are classified into three sorts:emotional behavior,rational behavior,perfunctory behavior.Based on these research results,the cooperative emotional behavior selection mechanism is set up.The correctness of this mechanism is testified by a simulative test carried out on artificial life Swarm platform.