Existing personalized information services methods have poor adaptability of user interest change.Based on the hierarchy of needs theory

this paper analyzed and classified the reasons of interest change

proposed hierarchical motivations analysis mechanisms of information categories and behaviors

and proposed the personalized information service model.The model analyses the user behavior records

provides diverse recommendations

and sets a feedback monitoring to cope with the interest change actively.Experiments show that the system service supported by the model has a higher quality of personalized service.