Abstract: Pleasure and sadness were primed by using photos and words through 2 experiments. Experimental group and the control one have 5 levels, the change in 5 levels was studied. Priming pleasure by photo or word varied lightly, and had a inclination of raising in 8 minutes. The priming pleasure persist at least 8 minutes. The priming sadness decreased sharply with time in the first two minutes, and the speed was close to that of the control one, but 4 minutes later, sadness becomes stable. The duration of priming sadness is 2 to 4 minutes.

Key words: priming emotion, pleasure, sadness, time effect