A refill device, comprises a case, the case has an opening end, a first case body and a case bottom; the case is configured for holding a pasty or solid household chemical; the refill device is suitable for use in combination with a packaging device, the packaging device comprises a second case body and a lifting mechanism, the first case body can be loaded into the second case body, the lifting mechanism comprises a lifting platform and a base; the opening end of the case is clampable at a first end of the second case body, the edge of the case bottom is abutable against the end surface of an open end of a fixed sleeve of the second case body, so that the case is fixed and not movable in the case; wherein the case bottom and the first case body are integrally formed; the case bottom of the case is provided with a first cutting line for enclosing a portion to form a bottom bracket; characterized in that the opening end of the case is covered with a sealing film for closing the opening end, the opening end of the case is provided with a flange formed integrally with the first case body, and the edge of the sealing film covers a surface of the flange, a second cutting line is provided along which the flange is separable from the first case body under the action of an external force; the case is made of a paper material to which a water-repellent agent and an oil-repellent agent are added or the paper material of the case comprises a coating layer to which a water-repellent agent and an oil-repellent agent are added is provided in the case, the top surface of the lifting platform abuts against the bottom bracket of the refill device, when the base is rotated to move the lifting platform towards the first end, the bottom bracket is pushed to separate from the case bottom, and the pasty or solid household chemical and the bottom bracket are driven to move relative to the first case body, so that the pasty or solid household chemical is exposed from the first end of the second case body for use by a consumer, or is withdrawn into the case for storage after use. wherein the case bottom and the first case body are integrally formed; the case bottom of the case is provided with a first cutting line for enclosing a portion to form a bottom bracket; characterized in that the opening end of the case is covered with a sealing film for closing the opening end, the opening end of the case is provided with a flange formed integrally with the first case body, and the edge of the sealing film covers a surface of the flange, a second cutting line is provided along which the flange is separable from the first case body under the action of an external force; the case is made of a paper material to which a water-repellent agent and an oil-repellent agent are added or the paper material of the case comprises a coating layer to which a water-repellent agent and an oil-repellent agent are added is provided in the case, the top surface of the lifting platform abuts against the bottom bracket of the refill device, when the base is rotated to move the lifting platform towards the first end, the bottom bracket is pushed to separate from the case bottom, and the pasty or solid household chemical and the bottom bracket are driven to move relative to the first case body, so that the pasty or solid household chemical is exposed from the first end of the second case body for use by a consumer, or is withdrawn into the case for storage after use.