Abstract: The personalized information service of library under the Web2.0 environment,which will ameliorate the information service system of library,is a peculiar information service based on the consumer study.However,the consumer study based on the network cannot deal with the problems of the right of individual information,especially the right of individual privacy.Balancing the relation between the personalized information service and the right protection of individual privacy of consumers,and realizing a benign interaction between the personalized information service and the consumers,is a important matter of the information service of contemporary library.

Key words: Web 2.0;personalized information service;consumer study;benign interaction