The embodiments of the present application disclose a method and a device for determining a service path, where the method includes: obtaining service performance information of a current service of a terminal device; switching, according to the service performance information, a service path of the current service from a first service path to a second service path, where the service path is a path used by the terminal device to access a network. The method and device according to the embodiments of the present application may improve the user experience of the terminal.