The invention discloses a shifting method for the seamless area, comprising: dividing the distributed antenna unit into odd type and even type at intervals; selecting the first antenna unit and the second antenna unit to form the virtual base station according to the upward signal intensity; the first antenna unit and the second antenna unit transmit the signal signs with different codes to the user device; while processing the area-crossing shift, updating the virtual base station according to the upward signal intensity; transmitting the to-be transmitted data to the antenna unit needing the shift to a same type antenna unit. The invention also discloses a shifting system for the seamless area. The complex of the invention is low, which can improve the system performance of the area-crossing shift by using the simple cooperation of the distributed antenna; the specific representation is that: the statistic average value of the communication noise radio at the subdistrict boundary issignificantly enhanced and the distribution of the communication noise radio at the subdistrict boundary is significantly improved, in the other words, the communication interruption performance is significantly enhanced.