A method of switching between operation modes of a video surveillance device, comprising: reading a current operation mode of the video surveillance device and recording an exposure parameter of the current operation mode; and determining whether a switch between operation modes comprising a black/white mode and a color mode is to be performed according to the current operation mode and an amount of ambient illumination; in case that the switch between the operation modes is to be performed, the method is further characterized by setting a target exposure value of a target operation mode to be switched to, and calculating an exposure parameter of the target operation mode according to the target exposure value in combination with the exposure parameter of the current operation mode, and adjusting the video surveillance device with the calculated exposure parameter; wherein determining whether the switch between the operation modes is to be performed according to the current operation mode and the amount of ambient illumination comprises: in case that the current operation mode is the black/white mode, determining that the current operation mode is to be switched to the color mode when the amount of ambient illumination is above a particular threshold; and in case that the current operation mode is the color mode, determining that the current operation mode is to be switched to the black/white mode when the amount of ambient illumination is below a particular threshold. reading a current operation mode of the video surveillance device and recording an exposure parameter of the current operation mode; and determining whether a switch between operation modes comprising a black/white mode and a color mode is to be performed according to the current operation mode and an amount of ambient illumination; in case that the switch between the operation modes is to be performed, the method is further characterized by setting a target exposure value of a target operation mode to be switched to, and calculating an exposure parameter of the target operation mode according to the target exposure value in combination with the exposure parameter of the current operation mode, and adjusting the video surveillance device with the calculated exposure parameter; wherein determining whether the switch between the operation modes is to be performed according to the current operation mode and the amount of ambient illumination comprises: in case that the current operation mode is the black/white mode, determining that the current operation mode is to be switched to the color mode when the amount of ambient illumination is above a particular threshold; and in case that the current operation mode is the color mode, determining that the current operation mode is to be switched to the black/white mode when the amount of ambient illumination is below a particular threshold. in case that the current operation mode is the black/white mode, determining that the current operation mode is to be switched to the color mode when the amount of ambient illumination is above a particular threshold; and in case that the current operation mode is the color mode, determining that the current operation mode is to be switched to the black/white mode when the amount of ambient illumination is below a particular threshold.