Using Chinese logogriph material, Through simulation about the four stage model of insight problem solving created by wallas(1926), We explored how helpful hints and unhelpful hints influence the chinese logogriph problems solving. Result showed that: During incubation, helpful hints elicited a more positive ERP deflection(P300-400、P400-600、P600-800) than unhelpful hints in the time window from 300-400ms、400-600ms、600-800ms respectively After the onset of the stimuli. Maps of the P300-400、P400-600、P600-800 showed strong activity in the left prefrontal cortex. It is indicated that helpful hints show greater facilitation on the logogriphs solving than unhelpful hints.