Performing tasks and returing audio and visual answers based on voice command

A non-transitory machine-readable medium, having encoded thereon program code, wherein, when the program code is executed by a machine, the machine implements a method for providing voice interactive services to a user through an artificial intelligence voice interactive system including a central server and a plurality of service servers each connected to the central server through a communication network, the method of the central server comprising:

• performing a registration operation upon generation of a predetermined event for registering the service servers and storing registration information of each service server;
• receiving voice command data, determining at least one task to perform based on the voice command data, and selecting at least one of the service servers based on the determined task;
• and
• generating an instruction message based on the voice command data, the determined at least one task, and the registration information of the selected service server, and transmitting the generated instruction message to the selected service server.

A method for providing, by a user device, various non-voice interactive services in response to a voice command from a user, the method comprising:

• receiving a voice command from user speech made around the user device;
• transmitting voice command data to a central server;
• receiving a result message from at least one of the central server and service servers;
• and
• outputting audio and video data based on the result message through at least one device counted to the user device,
• wherein:
• the result message is generated by a selected one of the service servers, as a result of performing at least one task included in the voice command through the selected service server, and
• the selected service server and the central server are communicated through an instruction message which has information necessary for the selected service server to perform the task included in the voice command data.