The invention relates to a method for acquiring an unlimited layer based on Web page, which comprises the following steps: (1) specifying entry page address StartURL acquired by web page; (2) analyzing each URL on the page, if the URL is a relative path, the URL is completed by using the entry address StartURL so as to convert the URL into an absolute path; and (3) judging whether the entry address StartURL is the superior of the URL or not, if so, a downlink acquisition is started to expand downwards continuously, if not, expansion is stopped; during the process of acquisition and expansion, for each URL, cyclically matching and extracting words in the web page, searching links on the web page, extracting and storing words on the link and words in the web page pointed by the link, so that all links of the web page are traversed for web page acquisition of unlimited layer. By using the method for acquiring web page, multi-level link analysis can be carried out against user requirement, contents concerned by the user can be extracted, and network information acquisition can be realized high efficiently.