The present invention discloses an analog signal collection circuit. The circuit comprises: an amplification circuit configured to receive and amplify analog signals; an AD converter connected with anoutput end of the amplification circuit; a controller connected with an output end of the AD converter and configured to determine a ratio of the size change range of digital signals and the total range of the AD converter is lower than a preset ratio or not, wherein if yes, an amplification proportion update value of the amplification circuit with a ratio being not lower than the preset ratio isdetermined, a parameter update value of components in the amplification circuit is determined, and corresponding regulation signals are sent to the regulation circuit; and the regulation circuit connected with the output end of the controller and configured to regulate parameters of the components in the amplification circuit to allow the amplification proportion to become the amplification proportion update value. The analog signal collection circuit effectively improves the signal-noise ratio of infrared signals. The present invention further discloses a analog signal collection method anddevice and a computer readable storage medium which have the same effects mentioned above.