To smoothly perform interaction processing by taking the power consumption of a device and the real-time response of the interaction processing in multi-task environment into consideration.

The interaction processing carried out by a speech input part 2, a power spectrum analysis part 3, a speech recognition part 4, a morpheme analysis/answer sentence generation part 5, and an agreeable response processing part 6 is real-time processing. A distribution manager 7 adjust the distribution of associated processing capability by words on the basis of the importance of each word obtained by power spectrum analysis and morpheme analysis so as to secure the real-time response of the interaction processing. The distribution of computer resources to respective function modules is dynamically controlled.