A projection apparatus, comprising an illumination system, a light valve and a projection lens, wherein: the illumination system is configured to output an illumination beam, the illumination system comprises a laser light source and a wavelength conversion element, wherein the laser light source is configured to emit a laser beam; and the wavelength conversion element is disposed on a transmission path of the laser beam, and a first region of the wavelength conversion element comprises at least one first optical functional region and at least one second optical functional region, wherein the at least one first optical functional region and the at least one second optical functional region do not contain a wavelength conversion substance, one of the first optical functional region and the second optical functional region is a light reflection region, and the other one of the first optical functional region and the second optical functional region is a light penetrating region; the light valve is disposed on a transmission path of the illumination beam, and converts the illumination beam into an image beam; and the projection lens is disposed on a transmission path of the image beam, wherein, in a first sub-time interval of a first time interval, the first optical functional region of the wavelength conversion element enters the transmission path of the laser beam, and the first optical functional region guides the laser beam to a first position with a first optical path, wherein the light valve is located at the first position, and in a second sub-time interval of the first time interval, the second optical functional region of the wavelength conversion element enters the transmission path of the laser beam, and the second optical functional region guides the laser beam to a second position with a second optical path, wherein the second position is different from the first position. the illumination system is configured to output an illumination beam, the illumination system comprises a laser light source and a wavelength conversion element, wherein the laser light source is configured to emit a laser beam; and the wavelength conversion element is disposed on a transmission path of the laser beam, and a first region of the wavelength conversion element comprises at least one first optical functional region and at least one second optical functional region, wherein the at least one first optical functional region and the at least one second optical functional region do not contain a wavelength conversion substance, one of the first optical functional region and the second optical functional region is a light reflection region, and the other one of the first optical functional region and the second optical functional region is a light penetrating region; the light valve is disposed on a transmission path of the illumination beam, and converts the illumination beam into an image beam; and the projection lens is disposed on a transmission path of the image beam, wherein, in a first sub-time interval of a first time interval, the first optical functional region of the wavelength conversion element enters the transmission path of the laser beam, and the first optical functional region guides the laser beam to a first position with a first optical path, wherein the light valve is located at the first position, and in a second sub-time interval of the first time interval, the second optical functional region of the wavelength conversion element enters the transmission path of the laser beam, and the second optical functional region guides the laser beam to a second position with a second optical path, wherein the second position is different from the first position.