The invention provides a lighting circuit, device and system with stable motions; the lighting circuit comprises a power conversion portion, a temperature detection portion and a control portion; the power conversion portion is connected with a light dimmer through a power supply path, and connected with a light load; an AC voltage with flow angle control and supplied by the light dimmer is converted into DC voltage, and the DC voltage is supplied to the light load; the temperature detection portion can detect the temperature of the lighting load along with the lighting process; the control portion can detect light dimming level of a light dimmer according to AC power, and can control power conversion of the power conversion portion according to the light dimming level; the control portion can determine power conversion portion output according to the light dimming level and temperature detected by the temperature detection portion in a first zone in which the light dimming level is bigger than a set value; in a second zone in which the light dimming level is smaller than the set value, the control portion can determine the power conversion output according to the light dimming level without using temperature. The lighting device and circuit prevent unintended brightness changes.