Abstract: A GDMP method includes: providing an open platform for distributing an EDM employing an open file format, a closed platform including a GDMP system, and a mobile device having a special-purpose application installed thereon; when the GDMP system receives order information about a product on the EDM and confirms the product has been paid, the GDMP system sending a user an electronic message including identification information according to contact information about the user included in the order information; when the special-purpose application is executed on the mobile device and the identification information is input, the GDMP system transmitting a content of the product employing a closed file format formed by encryption and encoding to the mobile device to store, and bounding the stored content of the product to the mobile device; and, executing the special-purpose application on the mobile device to play the stored content of the product.