Abstract: Lhasa has been the economic, cultural and political center of Tibet since ancient time．Due to influence ofnatural conditions in the regional and religious culture, it has formed the architectural color environment typical ofplateau characteristics．Besides its intrinsic properties, urban architectural color in Lhasa has also gradually evolvedinto a transmission media for plateau cultural information．It contains the connotation added thereto by the regionalculture and to some degree represents the culture of Lhasa City and the Zang nationality．Starting from historicalevolution of Lhasa, this paper makes an analysis of influencing factors for formation of traditional architectural color ofLhasa City and conducts in-depth analysis of connotation and modality expression of traditional urban architecturalcolor in Lhasa, which can provide beneficial reference for overall planning and control of urban architectural color inLhasa．