A waterproof ceiling comprising: a hanger unit (110, 210, 310, 410, 510) secured at an upper end thereof to a predetermined portion of a ceiling wall or the waterproof ceiling, and placed perpendicularly to a ground to support load on a lower end; a carrying channel (116, 216, 316, 416) connected to the lower end of the hanger unit (110, 210, 310, 410, 510), and placed parallel to the ground so as to be at right angles with the hanger unit (110, 210, 310, 410,510); a drain module bar (120, 220, 320) connected and secured to a predetermined portion on the carrying channel (116, 216, 316, 416) and forming a predetermined angle with the ground to create a flow passage for leaked water, comprising: a sidewall (120-1, 220-1, 320-1) bent at an upper end thereof outwards, and having at the upper end thereof a sealing groove (120-8, 220-8, 320-8) so that a sealing member (120-9, 220-9, 320-9) is inserted into the sealing groove (120-8, 220-8, 320-8); a fitting groove (120-6, 220-6, 320-6) formed inside the sidewall (120-1, 220-1, 320-1) such that each of both ends of a waterproof panel is fitted into the fitting groove (120-6, 220-6, 320-6); and a groove-shaped rail (120-3, 220-3, 320-3) provided in an outer surface of a bottom closing off lower ends of both sides of the sidewall (120-1, 220-1, 320-1) so that a puzzle anchor (270, 370) may be inserted into the rail; the waterproof panel (140, 240, 340) fitted to each of both sides of the drain module bar (120, 220, 320), thus closing a space between drain module bars (120, 220, 320); and a water collecting pipe (180, 280, 380) provided vertically on an end of the drain module bar (120, 220, 320), thus collecting the leaked water and discharging the water to an outside, wherein the hanger unit (110, 210, 310, 410, 510) is connected to the bottom of the drain module bar to support an additional load. a hanger unit (110, 210, 310, 410, 510) secured at an upper end thereof to a predetermined portion of a ceiling wall or the waterproof ceiling, and placed perpendicularly to a ground to support load on a lower end; a carrying channel (116, 216, 316, 416) connected to the lower end of the hanger unit (110, 210, 310, 410, 510), and placed parallel to the ground so as to be at right angles with the hanger unit (110, 210, 310, 410,510); a drain module bar (120, 220, 320) connected and secured to a predetermined portion on the carrying channel (116, 216, 316, 416) and forming a predetermined angle with the ground to create a flow passage for leaked water, comprising: a sidewall (120-1, 220-1, 320-1) bent at an upper end thereof outwards, and having at the upper end thereof a sealing groove (120-8, 220-8, 320-8) so that a sealing member (120-9, 220-9, 320-9) is inserted into the sealing groove (120-8, 220-8, 320-8); a fitting groove (120-6, 220-6, 320-6) formed inside the sidewall (120-1, 220-1, 320-1) such that each of both ends of a waterproof panel is fitted into the fitting groove (120-6, 220-6, 320-6); and a groove-shaped rail (120-3, 220-3, 320-3) provided in an outer surface of a bottom closing off lower ends of both sides of the sidewall (120-1, 220-1, 320-1) so that a puzzle anchor (270, 370) may be inserted into the rail; a sidewall (120-1, 220-1, 320-1) bent at an upper end thereof outwards, and having at the upper end thereof a sealing groove (120-8, 220-8, 320-8) so that a sealing member (120-9, 220-9, 320-9) is inserted into the sealing groove (120-8, 220-8, 320-8); a fitting groove (120-6, 220-6, 320-6) formed inside the sidewall (120-1, 220-1, 320-1) such that each of both ends of a waterproof panel is fitted into the fitting groove (120-6, 220-6, 320-6); and a groove-shaped rail (120-3, 220-3, 320-3) provided in an outer surface of a bottom closing off lower ends of both sides of the sidewall (120-1, 220-1, 320-1) so that a puzzle anchor (270, 370) may be inserted into the rail; the waterproof panel (140, 240, 340) fitted to each of both sides of the drain module bar (120, 220, 320), thus closing a space between drain module bars (120, 220, 320); and a water collecting pipe (180, 280, 380) provided vertically on an end of the drain module bar (120, 220, 320), thus collecting the leaked water and discharging the water to an outside, wherein the hanger unit (110, 210, 310, 410, 510) is connected to the bottom of the drain module bar to support an additional load.