An electronic cigarette, comprising: a power supply device providing control signal and driving power; an atomizer comprising an electric heater, an infiltration part and a liquid guiding seat, wherein the infiltration part is disposed on the electric heater, and the infiltration part and the electric heater are disposed within a hollow region of the liquid guiding seat, wherein the liquid guiding seat comprises an inner conduct ring, an inner side of the inner conduct ring is provided with a plurality of perforations for allowing the inner conduct ring to be in contact as well as communication with the infiltration part, wherein the liquid guiding seat further comprises an input port for communication with the inner conduct ring; a liquid storage structure comprising a passageway and a liquid container, wherein the airflow is allowed to pass through the passageway, and a cigarette liquid is stored in the liquid container; a fluid transportation device comprising an input channel and an output channel, wherein the input channel in communication with the liquid container and the output channel in communication with the input port of the liquid guiding seat of the atomizer enable the cigarette liquid to be transferred from the liquid container to the inner conduct ring of the liquid guiding seat and then transferred to the infiltration part through the plurality of perforations so that the cigarette liquid transferred to the electric heater of the atomizer for generating an atomized vapor is controlled at a certain amount; a sensing unit comprising an airflow sensor and an air pressure sensor, wherein the airflow sensor switches on or off the electric circuit of the power supply device according to the detected airflow, and the air pressure sensor adjusts, according to the detected pressure value, the control signal for modulating the rate of atomizing the cigarette liquid and the rate of providing the cigarette liquid; a casing, wherein the power supply device, the sensing unit, the fluid transportation device, the atomizer, the liquid storage structure and an intake-and-electric-connection element are disposed within the casing, and the casing has an inlet for the airflow to pass through, wherein after the airflow is fed into the inlet, the airflow passes through the sensing unit and the passageway of the liquid storage structure along an airflow path, wherein the fluid transportation device and the electric heater of the atomizer are electrically connected with the power supply device and the sensing unit through the intake-and-electric-connection element; and a mouthpiece located at an end of the casing and in communication with the passageway of the liquid storage structure, wherein the mouthpiece has a mouth, and the atomized vapor is transferred through the passageway of the liquid storage structure and the mouth. a power supply device providing control signal and driving power; an atomizer comprising an electric heater, an infiltration part and a liquid guiding seat, wherein the infiltration part is disposed on the electric heater, and the infiltration part and the electric heater are disposed within a hollow region of the liquid guiding seat, wherein the liquid guiding seat comprises an inner conduct ring, an inner side of the inner conduct ring is provided with a plurality of perforations for allowing the inner conduct ring to be in contact as well as communication with the infiltration part, wherein the liquid guiding seat further comprises an input port for communication with the inner conduct ring; a liquid storage structure comprising a passageway and a liquid container, wherein the airflow is allowed to pass through the passageway, and a cigarette liquid is stored in the liquid container; a fluid transportation device comprising an input channel and an output channel, wherein the input channel in communication with the liquid container and the output channel in communication with the input port of the liquid guiding seat of the atomizer enable the cigarette liquid to be transferred from the liquid container to the inner conduct ring of the liquid guiding seat and then transferred to the infiltration part through the plurality of perforations so that the cigarette liquid transferred to the electric heater of the atomizer for generating an atomized vapor is controlled at a certain amount; a sensing unit comprising an airflow sensor and an air pressure sensor, wherein the airflow sensor switches on or off the electric circuit of the power supply device according to the detected airflow, and the air pressure sensor adjusts, according to the detected pressure value, the control signal for modulating the rate of atomizing the cigarette liquid and the rate of providing the cigarette liquid; a casing, wherein the power supply device, the sensing unit, the fluid transportation device, the atomizer, the liquid storage structure and an intake-and-electric-connection element are disposed within the casing, and the casing has an inlet for the airflow to pass through, wherein after the airflow is fed into the inlet, the airflow passes through the sensing unit and the passageway of the liquid storage structure along an airflow path, wherein the fluid transportation device and the electric heater of the atomizer are electrically connected with the power supply device and the sensing unit through the intake-and-electric-connection element; and a mouthpiece located at an end of the casing and in communication with the passageway of the liquid storage structure, wherein the mouthpiece has a mouth, and the atomized vapor is transferred through the passageway of the liquid storage structure and the mouth.