Because the low carbon and sustainable development becomes more and more important in Chinese even in all over the world, author sorted out the logic of green building technology with the logic of digital technology by generalizing the development and type of modern green building technology. As the specific experiment object, Xuzhou Fenghua garden residential district was planned and designed though green digital design means. The reasonable general plan was designed scientifically and efficiently though the immediate colorful chill sunshine time map and repeated adjusted design. The above is to prove the efficiency and possibility of green digital design and bring inspiration to a deeper level of advanced algorithm.