Provided are a fusion device, system and method for implementing an Internet Protocol Television (IPTV) service. The fusion device integrates a Content Delivery Network (CDN) component and a network component. The CDN component receives a media service request initiated by a Set Top Box (STB), searches in a service policy template database for a service policy template matching a service type carried by the request, initiate a network support request to the network component, and uses the service policy template to provide a service for the STB after receiving a success response message fed back by the network component; and the network component searches in a network policy template database for a network policy template matching a service policy after receiving the network support request, executes the network policy template, feeds back a success response message when the execution succeeds, and uses the network policy template to provide a network resource support for the CDN component. The disclosure fuses a content delivery function and a network service function, which effectively ensures service quality of the IPTV service.