The ultraviolet lamp detecting fault device of this creation includes: a current sense mould group,To be concatenated with a plurality of ultraviolet germicidals being in parallel,To detect the total working electric current of the grade ultraviolet germicidals； One alarm device； One alarm value sets mould group,To store a current value； And an electric current comparison module,Compare the current value stored by the current value and alarm value setting mould group that the current sense mould group is detected,When the current value stored by current value small what alarm value setting mould group that the current sense mould group is detected,The electric current comparison module sends a signal to the alarm device and generates an alarm.本創作之紫外燈故障偵測裝置包含：一電流偵測模組，用以與複數個相並聯的紫外殺菌燈串接，以偵測該等紫外殺菌燈的總工作電流；一警報器；一警報值設定模組，用以儲存一電流值；以及一電流比對模組，比較該電流偵測模組所偵測到的電流值與該警報值設定模組所儲存的電流值，當該電流偵測模組所偵測到的電流值小於該警報值設定模組所儲存的電流值時，該電流比對模組發送一信號至該警報器產生一警報。
