Embodiments of the present disclosure disclose a method and an apparatus for a terminal application to access a NAS. The method includes: when a request for a terminal application to access a NAS is received, sending an establishment request for a hole punching connection to the NAS, and receiving an establishment request for a hole punching connection sent by the terminal application; and after the hole punching connection with the terminal application and the hole punching connection with the NAS are successfully established, completing data transmission between the terminal application and the NAS based on the successfully established hole punching connections.