In order to improve the use function of existing residential buildings, improve the living quality and urban style, standardize and guide the construction of elevator retrofitting project of existing residential buildings in Jiangsu Province, this guide is formulated according to the current relevant standards of the State and Jiangsu Province. This guide is applicable to existing residential elevator retrofitting projects in Jiangsu Province, for the design, construction, supervision and other relevant units and engineering and technical personnel reference. Contents include: preparation instructions, elevator selection table, elevation effect diagram, architectural design, structural design, mechanical and electrical design, overall integrated elevator.