1. An information searching method, comprising: acquiring a keyword for search input by a user, and acquiring user information of the user; and performing search according to the keyword and the user information to obtain searched-out information that matches the keyword and is relevant to the user information, wherein the user information comprises basic personal information of the user and friend information of the user, wherein the performing search according to the keyword and the user information to obtain searched-out information that matches the keyword and is relevant to the user information comprises: performing search according to the keyword and the basic personal information of the user to obtain searched-out information that matches the keyword and is relevant to the basic personal information of the user; and performing search according to the keyword and the friend information of the user to obtain searched-out information that matches the keyword and is relevant to the friend information of the user, when a friend notification information sent by the user is received, sending the searched-out information that matches the keyword and is relevant to the friend information of the user to a friend of the user according to an entrance for notifying; wherein the entrance for notifying comprises: an instant messaging chatting window, an address of an instant messaging space, a mobile phone number of the friend of the user, sending information of a cyber-acquaintance who the user may desire to know to the user, according to a common point of the user information and information of the cyber-acquaintance; wherein the cyber-acquaintance is not a friend of the user.