In UA, we can produce crop, horticulture, animal and aquatic production or any combination of these.In this steadily growing urban world, seventy-five percent of the people in industrialized countries already live in towns and cities, far from anything urban; urbanization has become a global occurrence in the last fifty years. A massive movement of people from rural villages to cities the world over is considered to be the greatest human migration in history.Freeman (1991) makes note of four major motivations and roles for UA to attend to in the developing countries: to satisfy basic hunger; to supplement an excessively starchy diet; to supplement family income; and to reduce expenditures on food to allow other purchases. Despite these dietary and socioeconomic realities, central governments often do not support urban agriculture. Indeed, many ignore or actively discourage it.UA stands for the return to an older meaning of business, which involved mutual interdependence and support, in which trade became a system of distributing resources, and currency had no intrinsic value. In UA, people would share more than a plot of land. They would share seeds and produce, tools and skills, time and knowledge.Sustainability is the ability to maintain balance of a certain process or state in any system. In an ecological perspective, sustainability can be defined as the capability of an ecosystem to uphold ecological processes, functions, biodiversity and productivity.We can call a city sustainable, or eco-city when it is designed with consideration of any and all environmental and social impact, when it is dedicated to minimisation of required inputs of energy, water and food, and waste output of heat, air and water pollution.Food production for cities – as well as in and near cities - is one of the many ways of decreasing the vulnerability of the worlds urban populations to global ecological change. UA should become an element of urban land use and social planning for sustainable development mostly in the countries that are still developing.Pearl River Delta is the fastest growing region, which most of its development is considered as urban sprawl. The dissimilarity between urban and rural areas within PRD is quickly fading. Due to this situation, reliable food chains that continuously provide fresh products are becoming increasingly important.The recent economic increase is intimidating its ecological cycle.