The invention discloses a method for extracting a QQ account number in an Android system. The method comprises the steps that (S1) data is prepared for extraction of the QQ account; (S2) a document containing QQ account information is extracted; (S3) the account number data document is analyzed; (S4) the account information is displayed; and (S5) an excel form is generated. The method disclosed by the invention has the beneficial effects that direct data extraction of Root is not needed, and the method is universally feasible; permission modification is not required, and analysis can be conducted directly aiming at an sd card, so the extraction speed will be greatly increased; data search efficiency of the analysis method is high; and data display aims at data evidence obtaining, so the method is more strict and professional.