This thesis discussed Toru Takemitsu's composing thought and taken Dream/Window in his late period as an example to analyze his composing grammar.

This thesis disscussed Toru Takemitsu's background and his potential cultural consciousness, then, extending the composing background of Dream/Window to Toru Takemitsu creative behavior which gave a spirit meaning to music. At last, we observed his music features from the formality and construction of his work. The analysis of contents of Dream/Window section by section verified how to accomplish Toru Takemitsu's creative thought with his language in his works.