Empirical method and literature analysis method are used in the paper for qualitative and quantitative analysis of public library efficiency and influencing factors.

This paper first gave the conception of library performance evaluation,then described the important meanings of it and then proposed an indicator system.

Discussion on construction patterns of 21st century digital public library;

Discussing the development of public library under information network environment;

New function and a rchitectural design of the public library;

Traditions and Innovations——Reflections on the Public Spirit and New Services of Public Libraries;

The Current Existing State of the County Public Libraries in the Underdeveloped Areas Is Not Optimistic;

The Remolding of Functions of Public Libraries in the Socialized Reading;

The public library is a momentous constitutive part of the learning type society,it is determined by the characteristics of the learning type society、the servicing purpose of the public library and the preponderance of the public library in building the learning type society.

This article expounded the benefit of the joint development of the public library and the library of community in the west,and proposed the methods of the joint development.

This paper discussed the content and methods of the public library propaganda,and suggested to mold the new images by strengthening propagating,innovating the methods of propaganda.