Copy cataloging is an important way to make modern cataloging.

The copy cataloging is the main method for our country\'s western language cataloging.

Downloading catalogue of Chinese books is one of important ways of modern catalogue.

This paper expounds the significance of the downloading catalogue,analyzes on the main factors influencing the quality of the downloading catalogue,and advances some countermeasures for improving the quality of the downloading catalogue.

The paper has expounded the general problems existed in download cataloging of western language materials, i.

Based on an analysis of virtues, problems of downloading cataloging, along with resources of downloading cataloging data, suggestions are proposed about professional ethics and proficiency of a cataloger, about smooth connection to the net, and about after-sale service offered by book salespersons.

This paper tries to investigate into several problems frequently occurring in downloading cataloging via the net so as to help improve the cataloging quality.

This paper has mainly discussed the main reasons that influence the quality of periodical cataloging and attached great importance to the introduction of ways to enhance the quality of periodical cataloging,such as MARC data downloading,periodical database search,E-mail consultation,Baidu and Google searching,periodical network searching,together with traditional reference books.