Content server, content providing system and content providing method

The invention provides a content server, a content providing system and a content providing method. The content server includes a reception unit for receiving metadata described with an execution state of a content executed in a first device connected through a network and identification information for identifying the first device through the network, as necessary, a content storage unit for storing a content regarding content of the metadata described with the execution state of the content executed in the first device, a content extracting unit for extracting the content regarding the content of the metadata described with the execution state of the content executed in the first device received by the reception unit from the content storage unit, as necessary, according to the reception at the reception unit, and a transmission unit for transmitting, as necessary, the content extracted from the content storage unit by the content extracting unit, as necessary, to a second device associated with the first d