10. A method of recognizing a voice command, the method comprising: recognizing a first voice command and generating probability distributions of the command intention for the first voice command in consideration of predefined possible cases; updating each of the probability distributions of the command intention based on a system response based on one of the generated probability distributions of the command intention to the first voice command and a second voice command issued in response to the system response; selecting an updated probability distribution of the command intention for the first voice command; and selecting a final command intention from the selected updated probability distributions of the command intention outputting an operation signal based on the selected final command intention, wherein the method of recognizing the voice command is implemented by at least a processor; wherein the generating of the probability distributions of the command intention for the first voice command comprises generating different probability distributions of the command intention for the first voice command for different possible cases, the updating of the probability distributions of the command intention for the first voice command comprises hierarchically updating each of the different probability distributions of the command intention, and the different possible cases include when the intention of the user is uniformly maintained, slightly modified, and completely changed.
10. A method of recognizing a voice command, the method comprising: recognizing a first voice command and generating probability distributions of the command intention for the first voice command in consideration of predefined possible cases; updating each of the probability distributions of the command intention based on a system response based on one of the generated probability distributions of the command intention to the first voice command and a second voice command issued in response to the system response; selecting an updated probability distribution of the command intention for the first voice command; and selecting a final command intention from the selected updated probability distributions of the command intention outputting an operation signal based on the selected final command intention, wherein the method of recognizing the voice command is implemented by at least a processor; wherein the generating of the probability distributions of the command intention for the first voice command comprises generating different probability distributions of the command intention for the first voice command for different possible cases, the updating of the probability distributions of the command intention for the first voice command comprises hierarchically updating each of the different probability distributions of the command intention, and the different possible cases include when the intention of the user is uniformly maintained, slightly modified, and completely changed. 14. The method of claim 10 , wherein the selecting of the updated probability distributions of the command intention for the first voice command comprises selecting a lowest-entropy probability distribution of the command intention from the updated probability distributions of the command intention for the first voice command.