A photoelectric detection circuit, a photoelectric detection method, an array substrate, a display panel, and a fingerprint image acquisition method are provided. The photoelectric detection circuit includes a pixel circuit and a phototransistor. The pixel circuit includes an infrared light-emitting element and is configured to emit infrared light according to a scanning signal and a light-emitting data signal. The phototransistor is configured to detect the infrared light emitted by the pixel circuit and reflected by a detection object in response to a sampling control signal.