A heating device includes: a frame including a plurality of extension structures connected with each other to define that the frame has a plurality of sides, which define a holding space； a plurality of heating units arranged on each side of the frame respectively to surround the holding space； and a mask at least partially covering the frame and the heating unit.一種加熱裝置，包含：一框架，包含複數個延伸結構，該等延伸結構相互連接以定義出該框架有複數個側面，該等側面定義出一容置空間；複數個加熱單元，分別設置於該框架的各側面以圍繞該容置空間；及一遮罩，至少部分包覆該框架及該加熱單元。
