In 1912, Ravel rearraged his Valses nobles et sentimentales from piano to orchestra. He brilliantly utilized the different characteristics of each instrument in his orchestration. The author will discuss the characteristics of the different instruments, and the rendering of timbres and techniques on the piano, in order to assist us in the consideration of color, touch and pedal in the piano version. There are four main parts in the thesis: first of all, an overview on Ravel's musical style; Secondly, an introduction on the background of Valses nobles et sentimentales; thirdly, an analysis and discussion on this piece; finally, through comparing the different applications, such as the compositional elements, orchestration and musical syntax between the piano and the orchestral versions, the author develops her own interpretation and discusses her thoughts.