An endoscopic image acquisition system comprising: an irradiation unit that irradiates a part to be observed in a body cavity of a patient with irradiation light; an image capturing unit that receives returning light from the part to be observed and captures images of the part to be observed; a display control unit that causes the captured images to be sequentially displayed on a display unit; a wavelength pattern changing unit that changes a wavelength pattern of the irradiation light or the returning light; an accepting unit that accepts an acquisition instruction to acquire images; an image capturing control unit that causes images of an observation wavelength pattern to be continuously captured at a certain frame rate and that causes images of a plurality of wavelength patterns to be sequentially captured in response to acceptance of the acquisition instruction, the plurality of wavelength patterns including the observation wavelength pattern and a wavelength pattern different from the observation wavelength pattern; and a storage control unit that causes the sequentially captured images of the plurality of wavelength patterns to be stored in a storage unit, wherein: the display control unit causes the images of the observation wavelength pattern continuously captured at the certain frame rate to be displayed on the display unit; and in response to the acceptance of the acquisition instruction, the display control unit causes, among the sequentially captured images of the plurality of wavelength patterns, the image of the observation wavelength pattern to be displayed on the display unit, and the image of the wavelength pattern different from the observation wavelength pattern not to be displayed. an irradiation unit that irradiates a part to be observed in a body cavity of a patient with irradiation light; an image capturing unit that receives returning light from the part to be observed and captures images of the part to be observed; a display control unit that causes the captured images to be sequentially displayed on a display unit; a wavelength pattern changing unit that changes a wavelength pattern of the irradiation light or the returning light; an accepting unit that accepts an acquisition instruction to acquire images; an image capturing control unit that causes images of an observation wavelength pattern to be continuously captured at a certain frame rate and that causes images of a plurality of wavelength patterns to be sequentially captured in response to acceptance of the acquisition instruction, the plurality of wavelength patterns including the observation wavelength pattern and a wavelength pattern different from the observation wavelength pattern; and a storage control unit that causes the sequentially captured images of the plurality of wavelength patterns to be stored in a storage unit, wherein: the display control unit causes the images of the observation wavelength pattern continuously captured at the certain frame rate to be displayed on the display unit; and in response to the acceptance of the acquisition instruction, the display control unit causes, among the sequentially captured images of the plurality of wavelength patterns, the image of the observation wavelength pattern to be displayed on the display unit, and the image of the wavelength pattern different from the observation wavelength pattern not to be displayed. the display control unit causes the images of the observation wavelength pattern continuously captured at the certain frame rate to be displayed on the display unit; and in response to the acceptance of the acquisition instruction, the display control unit causes, among the sequentially captured images of the plurality of wavelength patterns, the image of the observation wavelength pattern to be displayed on the display unit, and the image of the wavelength pattern different from the observation wavelength pattern not to be displayed.