The paper had illustrated concept and positioning of avant-garde,and proposed that there were three major methods to manifest concepts in conceptual landscape design,which were:① reproduced landscape from historical perspective;② landscape of local characteristic based on fields;③ landscape of abstract formal beauty with visual impact.Characteristics of conceptual landscape design had been summarized by taking classical design by Martha Schwartz for example,which contained ① fuzzy boundary between art and garden,② gardens full of imagination and freedom,③ pioneering spirit full of courage and challenge.Finally,the paper had predicted the future of conceptual landscape design and considered that conceptual design would change with the emergence of high-tech and new materials;and conceptual landscape designers should be in possession of pioneering spirit of challenge and innovation.