The invention provides a lamp array flashing system applied to camera time detection and/or setting. The lamp array flashing system comprises a lamp array capable of operating according to a predetermined dot state sequence at a predetermined cycle to turn on or turn off the lamps; and a lamp array on-off controller used for controlling the on-off of the lamps in the lamp array. Further, the lamps in the lamp array are LED lamps, wherein all LED lamps are divided into N groups; each group of LED lamps flash according to a marquee manner; the groups have a grade relation, and only when the group with low grade accomplishes a flashing period, the adjacent group with high grade can enter a next flashing state, and the circulation is performed in this way. A camera shoots the lamp array and identifies the flashing state to detect the shooting timing and can adjust the shooting timing. The camera time detection setting technology is easy to deploy, convenient to implement and low in cost; and relatively high time control precision can be realized, and the time control precision is only limited by the shortest camera exposure time; and the shooting time control is to directly adjust the shooting image time, and the precision is high.