Abstract: To address the issue of remote access to FANUC CNC system PMC within an internal network, a method for remote access to FANUC CNC system PMC based on intranet penetration is proposed. This method utilizes four intranet penetration tools including “peanut shell” software, NATAPP, frp, and “peanut shell” hardware box to achieve the objective. The specific configuration methods for each tool in practical usage are elaborated in detail. A comparative analysis is conducted on the application scenarios, advantages, and disadvantages of these four methods. These approaches exhibit characteristics of low cost and high efficiency, providing guidance and reference for achieving remote access to FANUC CNC System PMC.