This paper analyzes the design methods in the Schroder house (1924) executed by the Dutch architect G. Th. Rietveld (1899-1964). The compositional principles which underlies the house design are examined through the analysis of 'Cartesian Coordinate System (joint system)' and 'Use of colour' which characterizes a series of his furniture design from 1918 to 1923. It indicates that Rietveld attempted to realize the simplicity, clarity, and flexibility of spatial expression in his first independent architecture by the application of technical skills which have been developed in his early furnitures.