The invention relates to the field of distribution transformer zone area voltage quality management, and discloses a zone area low-voltage analysis method and a system. Zone area initialization information inputted by a user is received, the zone area initialization information comprises zone area basic information, zone area distribution and transformation information, zone area line information and zone area operation data, a control instruction of the user is received, and according to the user control instruction and the zone area initialization information, the control instruction is analyzed and fed back. Comprehensive analysis on low voltage causes in the distribution transformer zone area and reasonable measure making are realized, and comprehensive treatment on low voltage in the distribution transformer zone area is facilitated.