The invention discloses a method and a system for maintaining a computer. The method for maintaining the computer includes the followings steps performed when an abnormal problem occurs in the computer, which are respectively: S1, collecting abnormal information of the computer, invoking detailed analysis and solutions, corresponding to the abnormal information, from an abnormal information database built in advance, and displaying the detailed analysis and the solutions; S2, judging whether a first scheme and/ or a second scheme can be used to solve the abnormal problem according to the detailed analysis and the solutions, which are displayed. The first scheme includes: solving the abnormal problem through the computer according to the displayed solutions, and the second scheme includes: uploading the displayed detailed analysis to a manufacturer of the computer. According to the method for maintaining the computer, the different solutions for solving the abnormal problem are selected by collecting the abnormal information, and therefore a large amount of labor and material cost is saved, and quick, convenient and timely and reliable services are provided to a user.