An electronic cigarette and an atomizer device thereof are provided. The atomizer device includes a housing, a liquid reservoir chamber (115) formed in the housing, and a adjusting valve (13) engaging with the housing； a liquid injection channel (1131) is defined in the housing for injecting liquid solution into the liquid reservoir chamber (115)； a first opening (1311) corresponding to the liquid injection channel (1131) is defined in the adjusting valve (13)； the adjusting valve (13) is movable between a first position and a second positon across a surface of the housing； when the adjusting valve is in the first position, the first opening (1311) communicates with the liquid injection channel (1131) to open the liquid injection channel (1131), and when the adjusting valve (13) is in the second positon, the first opening (1311) misaligns with the liquid injection channel (1131) to close the liquid injection channel (1131). In the solution of the present disclosure, the adjusting valve (13) is movable between the first position and the second position such that the first opening (1311) of the adjusting valve (13) can be adjusted to open or close the liquid injection channel (1131), thus, the injection of the liquid solution is facilitated； in addition, since the liquid solution can be injected into the atomizer device without removing the suction nozzle, the injection of the liquid solution is convenient and simplified and the situation that the suction nozzle gets dirty or get lost can be avoided.
