Provided are an apparatus and method for checking Personal Computer (PC) security. The apparatus includes a check module for checking a security configuration of a PC on the basis of a check policy received from a security check server and outputting check results, and a control module for changing the security configuration of the PC on the basis of a control policy received from the security check server and the check results received from the check module. According to the apparatus, a security check agent installed in each PC performs security check and changes a security configuration according to a control policy, such that the security configurations of PCs in a network can be managed collectively.