The invention discloses a dual-data passage lamp control method and a controller. The method is applied to a lamp and a lamp controller. A data passage between the lamp controller and the lamp is dualdata passages comprising a series SPI data transmission passage and a parallel DMX512 data transmission passage. The dual-data passage lamp control method comprises the steps that the lamp controllerperforming control and troubleshooting on the lamp by the dual data passages and the lamp completes control and troubleshooting by the dual data passages. A dual-passage communication protocol mode is employed, and the data transmission passage in a series SPI mode and the data transmission passage in a parallel DMX512 are built between the controller and the lamp; and in the dual-passage mode, an unfavorable lamp can be rapidly checked during the debugging process, so that the artificial cost is reduced, and moreover, the system stability during normal communication in running of the systemis improved.