The utility model relates to an ultrasonic fog making system for plant cultivation, which is suitable for processing a liquid, and comprises an atomizing device and a detecting device.The atomizing device includes a concussion tank which can hold the liquid, a concussion unit which can drive the concussion tank to vibrate the liquid by ultrasonic wave to atomize the liquid as a droplet, and an output unit which can output the droplet to the environment.The detection and control device includes a temperature detector capable of detecting the ambient temperature, a humidity detector capable of detecting the ambient humidity, and a control unit capable of controlling the atomization device according to the ambient temperature and humidity to control the droplet output.The new model can humidify the environment and reduce the environment temperature, so it can help plants resist high temperature, and can create a fog, temperature and humidity environment suitable for specific plant growth.一種用於植物栽培的超音波造霧系統，適用於處理一液體，並包含一個霧化裝置，以及一個偵控裝置。該霧化裝置包括一個能容裝該液體的震盪槽、一個能帶動該震盪槽對該液體進行超音波震盪以將該液體霧化為霧滴的震盪子，以及一個用來將該霧滴輸出至環境中的輸出單元。該偵控裝置包括一個能偵測環境溫度的溫度偵測器、一個能偵測環境濕度的溼度偵測器，以及一個能依環境的溫度及濕度控制該霧化裝置以控制該霧滴產量的控制單元。本新型能對環境加濕而降低環境溫度，故能協助植物對抗高溫，並能創造出適合特定植物生長的含霧、適溫、濕潤環境。
