Abstract: In process of crop growth, water and fertilizer are two essential elements．Reasonable irrigation and fertilization are very beneficial to crop reduction and efficiency increase．Traditional way of "flooding and fertilizing" will not only reduce utilization rate of water and fertilizer, but also aggravate pollution problem of farmland soil environment．Water-fertilizer integration technology, as a new technology of coupling water and nutrients, can achieve purposes of precise fertilization, improving soil environment, saving water and increasing production, thus effectively alleviating contradiction between resources and environment and promoting sustainable development of green agriculture．Response of pepper growth and development, dry matter accumulation, water and fertilizer utilization, yield and quality indicators to integration of water and fertilizer was summarized, and suggestions on rational utilization of intelligent system, multi-factor integration technology and coupling model planning were put forward aiming at practical application of this technology in agricultural production, so as to provide reference for application of integration of water and fertilizer in pepper high-yield cultivation．