Blue-and-white porcelain is an important category in the history of Chinese ceramics. Since its rise, more than six hundred years ago, the production of blue-and-white porcelain has left abundant cultural resources. Many museums and cultural heritage preservation institutes have huge collections of blue-and-white porcelain objects. However, due to the fragile nature of porcelain wares, these objects often suffer from deterioration including physical damage and loss, which severely affects their visual perception on display. Restoration methods for the purpose of artistic display play an important role in bringing the damaged blue-and-white porcelains back to the public’s view, of which retouching is the key, as well as a challenge. This study intends to propose practical techniques and methods for retouching of blue-and-white porcelains, through observation and analysis of the body and glaze, the raw materials of cobalt blue, the painting techniques for decorative motifs, the detailed features of decorations and the conditions of damage. It is hoped that these retouching techniques and methods will enable the blue-and-white porcelains to receive proper treatment and to meet the standards of artistic display.