The present disclosure discloses a method, an apparatus and a system of processing related keywords. The method includes: receive a primary keyword inputted by a user; form a spliced URL for requesting related keywords based on the primary keyword; establish a link between an embedded window object in a current web page and a server using the URL to obtain the related keywords from the server; the embedded window object creates a keyword list and presents the related keywords in the current web page; and obtain a related keyword selected by the user and instantaneously add the related keyword into an input box.