The connotation of public archives could not be just defined by the explanation of public character from The Dictionary of Modern Chinese, and not be easily achieved just turn public archives to the cultural building of city landmark, and even less point that if only traditional archives provide services and open to the society, the public archives will be established momentary. The establishment of public archives is a long process, and need us to carry out the work practically from the basis of fundamental realities of archives work and social developmental environment of our country. As to the public archives construction, this article expounds the principles that should be followed, the development path and “the three step” development strategy, and related security mechanism is also discussed.