The invention discloses an electronic circuit achieving acoustic and photoelectric angle indication and a leveling instrument which adopts the electronic circuit and has an acoustic and photoelectric indication function. The electronic circuit achieving acoustic and photoelectric angle indication comprises a main control circuit a, a power supply circuit b, a key circuit c, a sensor module circuit d, an LED indication module circuit e, a buzzing module circuit f and a data storage module g; the control circuit a comprises a microcontroller U2, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C8, an electrolytic capacitor E1, a resistor R11, a resistor R12 and a resistor R20; one end of the capacitor C2 is connected with a sixth pin of the microcontroller U2, and the other end of the capacitor C2 is grounded; a fifth pin of the microcontroller U2 is connected with a power supply of +2.4 V, and meanwhile the fifth pin of the microcontroller U2 is connected with one end of the capacitor C3, one end of the capacitor C6, one end of the resistor R12 and a ninth pin of the microcontroller U2 in parallel. According to the electronic circuit achieving acoustic and photoelectric angle indication and the leveling instrument which adopts the electronic circuit and has the acoustic and photoelectric indication function, the design circuit device which is high in accuracy and has the acoustic and photoelectric indication function is achieved, and a current angle value state can be displayed through acoustic and photoelectric changes only by putting measuring equipment on a testing plane.