A communication system including a terminal, an electronic device, and a server is provided. The terminal includes a login part logging in to the server, an identifier reception part receiving a device identifier corresponding to a user who has logged in, and a terminal instruction transmission part transmitting to the server the device identifier received by the identifier reception part and an instruction for the electronic device. The server includes an identifier storage part storing a user identifier in association with the device identifier of the electronic device corresponding to the user, an identifier transmission part acquiring device identifier corresponding to the user identifier and transmitting the device identifier to the terminal, a first server instruction reception part receiving the device identifier and the instruction for the electronic device, and a server instruction transmission part transmitting the received instruction to the electronic device corresponding to the received device identifier.

A communication system including a communication device, an electronic device, and a server is provided. The communication device includes an authorization information request part transmitting a request for authorization information, an authorization information reception part receiving the authorization information, a first data request information reception part receiving data request information, a data request information transmission part transmitting the received data request information, a data reception part receiving data, and a first data transmission part transmitting the received data. The server includes an identifier storage part storing the device identifier, an authorization information request reception part receiving the request for the authorization information, an authorization information creation part acquiring a user identifier and creating the authorization information, a first authorization information transmission part transmitting the created authorization information, a second data request information reception part receiving the data request information, and a second data transmission part transmitting the data.

A communication system including a communication device, a terminal configured to be able to communicate with the communication device, and a server is provided. The communication device includes a request transmission part transmitting to the terminal a request for connection information for connecting to the server, a connection information reception part receiving from the terminal the connection information requested by the request transmission part, and a connection part communicably connecting to the server by using the connection information received by the connection information reception part. The terminal includes a request reception part receiving the request for the connection information from the communication device, a connection information acquisition part, acquiring the connection information corresponding to the request for the connection information received by the request reception part, and a connection information transmission part, transmitting the connection information acquired by the connection information acquisition part to the communication device.

A communication device is provided. The communication device includes a connection instruction acquisition part acquiring a connection instruction from a user, a first communication establishment part establishing a first communication being communication with a terminal in response to acquisition of the connection instruction by the connection instruction acquisition part, a first connection information reception part receiving connection information for connecting to a server from the terminal via the first communication established by the first communication establishment part, and a second communication establishment part establishing a second communication being communication with the server by using the connection information received by the first connection information reception part.

A communication system including a communication device, a terminal configured to be able to communicate with the communication device, and a server is provided. The communication device includes a request transmission part transmitting to the terminal a request for connection information for connecting to the server, a connection information reception part receiving from the terminal the connection information requested by the request transmission part, and a connection part communicably connecting to the server by using the connection information received by the connection information reception part. The terminal includes a request reception part receiving the request for the connection information from the communication device, a connection information acquisition part, acquiring the connection information corresponding to the request for the connection information received by the request reception part, and a connection information transmission part, transmitting the connection information acquired by the connection information acquisition part to the communication device.

A communication system including a terminal, an electronic device, and a server is provided. The terminal includes a login part logging in to the server, an identifier reception part receiving a device identifier corresponding to a user who has logged in, and a terminal instruction transmission part transmitting to the server the device identifier received by the identifier reception part and an instruction for the electronic device. The server includes an identifier storage part storing a user identifier in association with the device identifier of the electronic device corresponding to the user, an identifier transmission part acquiring device identifier corresponding to the user identifier and transmitting the device identifier to the terminal, a first server instruction reception part receiving the device identifier and the instruction for the electronic device, and a server instruction transmission part transmitting the received instruction to the electronic device corresponding to the received device identifier.