A system and a method for OBSi-based (open service gateway initiative) service delivery framework are provided. The system is adaptable to a first host executing an OSGi bundle. A mobile service module of the first host is inherited through the OSGi bundle. A second host is assigned when the OSGi bundle calls a mobilize function inherited from the mobile service module. A bytecode and an instance of the OSGi bundle are obtained through a first delivery context processing module of the first host. The bytecode and instance of the OSGi bundle are transmitted from the first host to the second host through the first delivery context processing module and a second delivery context processing module of the second host. The bytecode and instance of the OSGi bundle are installed and the OSGi bundle is executed through the second delivery context processing module.