Abstract: A method, browser, network device and system for presenting relevant information of accessed website are disclosed in the present disclosure. The method comprises the following steps: receiving the website address of the accessed website at the browser; requesting a security detecting device to detect the website address; receiving the detecting result returned from the security detecting device; when the website address is indicated to be a malicious website address by the detecting result, displaying a prompt message that the accessed website is a malicious website at the browser; and when the website address is indicated to be an un-malicious website address by the detecting result, obtaining the website certification information of the accessed website from a first server, and displaying the obtained website certification information at the browser.