The improvement of water and soil conservation needs the complex science demonstration plots in a new era.According to this,the water resource agency of Yanqing County,Beijing City plans to develop a synthetic demonstration area of water and soil conservation based on the old one.The new synthetic demonstration area includes two domains: a water and soil conservation complex lab and water and eight soil conservation demonstration plots.They will explode scientific principles and technology such as rainfall monitoring,water saving,ecology restoration,use of ecology energy and so on.