Remotely configuring mobile telephone software based on subscription. A user's mobile telephone stores user description information and service description information related to the mobile telephone in a service management platform after installing and starting a mobile telephone service. The user logs on to the service management platform through access equipment, and subscribes to mobile telephone service modality and functions available after identity authorization. The user can configure service parameters through access equipment, download the mobile telephone service software or service description information from the service management platform, and install them to the user's mobile telephone after a subscription or configuration operation. The user can log on to the service management platform through a new mobile telephone when the mobile telephone is replaced. The mobile telephone service software and service description information used in the original mobile telephone can be moved to the new mobile telephone selectively or as a whole after identity authorization.