A method for manufacturing a printed product capable of resisting abnormal environmental changes and operating in all weather conditions, and suitable for hygiene management operations, characterized in that the method comprises: providing a chemical waterproof adhesive, the chemical waterproof adhesive comprising at least one selected from a group consisting of rubber, polyvinyl chloride, polyurethane, silicone elastomer, fluoropolymer, and wax; mixing the chemical waterproof adhesive with lignin to form a weather-resistant adhesive, the lignin being in the form of gel-like fiber cell membranes; mixing the weather-resistant adhesive with waterproof fiber filaments to form a pulp, wherein said waterproof fiber filaments comprises natural fibers, and wherein during the mixing process, the weather-resistant adhesive penetrates into the natural fibers to achieve waterproof and rigid effects; processing the pulp with steaming, boiling, washing, bleaching and drying in a traditional paper producing machine; pressing the processed pulp by a pressure-adjustable roller to form a sheet material with micro-pores formed on both sides of the sheet material, the sheet material having a thickness ranging from 0.01 mm to 3 mm, and exhibiting durability and printability characteristics; forming waterproof and weather-resistant images on one or both sides of the sheet material by spraying or thermally transferring an ink or sublimating a dye on the sheet material, so that the ink or the sublimated dye penetrates through the micro-pores and fuses with the waterproof fiber filaments, the ink being selected from a group consisting of pigment particles suspended in an aqueous or non-aqueous solution, and a dye mixed in an aqueous or non-aqueous solution; and drying and solidifying the ink, or cooling and solidifying the sublimated dye to form a printed sheet material, wherein a ratio of the lignin to the chemical waterproof adhesive ranges from 1% to 50%, and the pigment particles have a dimension of less than 5 microns, and the micro-pores have a dimension of no less than 5 microns. providing a chemical waterproof adhesive, the chemical waterproof adhesive comprising at least one selected from a group consisting of rubber, polyvinyl chloride, polyurethane, silicone elastomer, fluoropolymer, and wax; mixing the chemical waterproof adhesive with lignin to form a weather-resistant adhesive, the lignin being in the form of gel-like fiber cell membranes; mixing the weather-resistant adhesive with waterproof fiber filaments to form a pulp, wherein said waterproof fiber filaments comprises natural fibers, and wherein during the mixing process, the weather-resistant adhesive penetrates into the natural fibers to achieve waterproof and rigid effects; processing the pulp with steaming, boiling, washing, bleaching and drying in a traditional paper producing machine; pressing the processed pulp by a pressure-adjustable roller to form a sheet material with micro-pores formed on both sides of the sheet material, the sheet material having a thickness ranging from 0.01 mm to 3 mm, and exhibiting durability and printability characteristics; forming waterproof and weather-resistant images on one or both sides of the sheet material by spraying or thermally transferring an ink or sublimating a dye on the sheet material, so that the ink or the sublimated dye penetrates through the micro-pores and fuses with the waterproof fiber filaments, the ink being selected from a group consisting of pigment particles suspended in an aqueous or non-aqueous solution, and a dye mixed in an aqueous or non-aqueous solution; and drying and solidifying the ink, or cooling and solidifying the sublimated dye to form a printed sheet material, wherein a ratio of the lignin to the chemical waterproof adhesive ranges from 1% to 50%, and the pigment particles have a dimension of less than 5 microns, and the micro-pores have a dimension of no less than 5 microns.