Embodiments of the present invention disclose a method, an apparatus and a system for accessing a virtual private network by a virtual private cloud. A data center breakout gateway receives first configuration information; creates a first VPN instance according to identifier information of the VPN; determines VPC according to parameter information of the VPC, and binds the VPC to the first VPN instance; and sends second configuration information to the network side PE according to address information of the network side PE, where the second configuration information includes the identifier information of the VPN, so that the network side PE configures an upper layer VPN instance for the first VPN instance on the network side PE according to the identifier information of the VPN. In the embodiments of the present invention, the problem of automatically accessing the virtual private network by the virtual private cloud is solved.