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pasty or solid household chemical is exposed from the first end of the second case body for use by a consumer, or is withdrawn into the case for storage after use.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. <EOS>