A method of sequencing an LED light string includes steps of: (a) using a control module to provide a pulse signal to an LED light string having a plurality of LED lights, (b) obtaining an LED light with a current sequence characteristic of the LED light string at a first rising edge or a first falling edge of the pulse signal, (c) self memorizing, by the LED light, as a current sequence, and changing a self state of the LED light so that the current sequence characteristic is no longer generated, and (d) repeating to perform step (b) and (c) at next rising edge or next falling edge of the pulse signal so as to obtain the sequence of the LED lights.
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