An airtight device comprising: a container; and an airtight cover disposed on the container, wherein the airtight cover comprises: a fixing bracket having at least one through hole and at least one guiding slot, wherein the through hole communicates with an interior space of the container, the guiding slot comprises a first top surface and a second top surface higher than the first top surface; at least one door configured to cover the through hole; and at least one pressuring handle pivoted to the door, the pressuring handle having a first section, a second section, and a rotation pivot disposed between the first and second sections (251, 253), wherein the first section and the second section are configured to rotate relative to each other, and wherein the second section is configured to receive a force for driving the first section to move from below the second top surface to below the first top surface such that the rotation pivot pressures the door, wherein the airtight cover has a connection rod, and the at least one pressuring handle includes a plurality of the pressuring handles, the second sections of the pressuring handles are rotatably connected to the connection rod. a container; and an airtight cover disposed on the container, wherein the airtight cover comprises: a fixing bracket having at least one through hole and at least one guiding slot, wherein the through hole communicates with an interior space of the container, the guiding slot comprises a first top surface and a second top surface higher than the first top surface; at least one door configured to cover the through hole; and at least one pressuring handle pivoted to the door, the pressuring handle having a first section, a second section, and a rotation pivot disposed between the first and second sections (251, 253), wherein the first section and the second section are configured to rotate relative to each other, and wherein the second section is configured to receive a force for driving the first section to move from below the second top surface to below the first top surface such that the rotation pivot pressures the door, wherein the airtight cover has a connection rod, and the at least one pressuring handle includes a plurality of the pressuring handles, the second sections of the pressuring handles are rotatably connected to the connection rod. a fixing bracket having at least one through hole and at least one guiding slot, wherein the through hole communicates with an interior space of the container, the guiding slot comprises a first top surface and a second top surface higher than the first top surface; at least one door configured to cover the through hole; and at least one pressuring handle pivoted to the door, the pressuring handle having a first section, a second section, and a rotation pivot disposed between the first and second sections (251, 253), wherein the first section and the second section are configured to rotate relative to each other, and wherein the second section is configured to receive a force for driving the first section to move from below the second top surface to below the first top surface such that the rotation pivot pressures the door, wherein the airtight cover has a connection rod, and the at least one pressuring handle includes a plurality of the pressuring handles, the second sections of the pressuring handles are rotatably connected to the connection rod.