Abstract: Pattern language is a new approach toward landscape expression and spatial reasoning based on ecological personality of landscape space, which studies the basic vocabulary and logical relations from basic unit, blend unit to total landscape using the space pattern as language sign, and so pattern language can support the design vocabulary, syntax and grammar to create new landscape. Pattern language research uses the method of landscape space prototype and space performance, space selection and sample analysis, space abstract and pattern extraction, pattern language vocabulary and logic, and pattern language system construction and validation. All these methods are based on the methodology of Structuralism and deconstruction, self-organization coordination theory and logical design, space forming process and spatial reasoning and multiple meaning and pragmatics of landscape. The basis of the research methods and methodology of pattern language is determined by landscape space systematic, organic and evolution character, and is a combination of multidisciplinary research methods and methodologies.