A dual control heating device for aquarium, comprising a control box with a control circuit, the control circuit comprising a power supply unit, a first group of control units, a relay and a warmer, mainly adding a second group of control units (such as MCU microcontroller or comparator) and share the power supply or individual power supply, and jointly control the relay, when any control loop is low frequency, the relay does not work； the other control structure is to establish independent power supply and relay, The first control module and the second control module are disposed. The second control module can be disposed before or after the first control module. When the first control unit of the first control module detects that it is from any In the case of anomalies, the aquarium pet environment can be maintained at the most appropriate temperature.一種水族用雙重控制加溫裝置，包含一內具有控制電路之控制盒，該控制電路包含有一電源單元、一第一組控制單元、一繼電器、一加溫器，主要係增加第二組控制單元(如MCU微控制器或者比較器)並共用電源或者是個別電源，以及共同控制繼電器，當任一控制迴路為低電頻時，繼電器不工作；另一控制構造則是建立獨立電源及繼電器，其包含第一控制模組、第二控制模組，第二控制模組可配設在第一控制模組之前或之後，當第一控制模組之第一組控制單元偵測到不管來自何種異常時，水族寵物環境皆能保持在最適當溫度。
