Since the birth of the Internet, information on the network growth is almost explosive. Facing such a flood of information, search engine technology emerged. However, when the search engine seeks to cover as much information as possible , it also brings its own vice-effects : First, too much storage capacity. Second, the self-long cycle of renewal. Faced with this kinds of vice-effects, professional search engine has begun to emerge. Professional search engine is for a given area to meet the need of a specific category of people. Professional search engine is concerning only professional information of this area and discipline , therefore, its storage capacity will be more smaller. For a relatively smaller storage capacity on the characteristics of professional search engine,its own search speed is greatly improved. Meanwhile, because of the relative concentration of a certain area of information, in specifical refering of information to the degree, professional search engine has more advantages. Professional search engine there in large measure has alleviated the overloading of information storage problem, and focused acquisits and manages to a field of information at the same time, it is another forward of search engine history of the development.This paper introduces principles and the structure of general search engine network spiders procedures at first, then gives professional search engine model, on this basis, seeks to use agent technology on the field of artificial intelligence for the building of a professional search engine system. For agent itself with a certain intelligence , applying it to professional search engine will enable professional search engine itself has some intelligent and better judgment for the relating to the theme , so it can more effectively carry out the searching for information. |