A dehydration system (100, 200) for separating water from an aqueous organic compound, said dehydration system (100, 200) comprising: a separation membrane module inside of which one or plural tubular membrane elements, each comprising a tubular porous ceramic support and a zeolite membrane disposed on said support, are arranged and which separates water from said aqueous organic compound supplied thereto using said one or plural tubular membrane element(s); a pressure-reducing means for reducing the pressure on a water permeate side of each tubular membrane element; and a condenser which is arranged between said separation membrane module and said pressure-reducing means via a transmission pipe (P 3) and condenses water vapor permeating through said tubular membrane element(s) into water, wherein said dehydration system (100, 200) is configured to allow water to permeate from an outer surface to an inner surface of the membrane element(s) by bringing the aqueous organic compound into contact with the outer surface of each tubular membrane element and by reducing the pressure on the inner surface side by means of said pressure-reducing means, and characterised in that said dehydration system has at least one of the following configurations and: Configuration: said dehydration system (100, 200) comprises a temperature-maintaining means for maintaining said transmission pipe (P 3) connecting said separation membrane module and said condenser to have a temperature at which water does not condense, and Configuration: said transmission pipe (P 3) connecting said separation membrane module and said condenser is arranged downward from a permeated water outlet of said separation membrane module toward said condenser meaning any state where the condenser is positioned lower than the permeated water outlet of the separation membrane module and the transmission pipe (P 3) is connected such that it is not positioned higher than the permeated water outlet of the separation membrane module, wherein said configurations serve to inhibit backflow of condensed water generated in the transmission pipe (P 3) into the separation membrane module. a separation membrane module inside of which one or plural tubular membrane elements, each comprising a tubular porous ceramic support and a zeolite membrane disposed on said support, are arranged and which separates water from said aqueous organic compound supplied thereto using said one or plural tubular membrane element(s); a pressure-reducing means for reducing the pressure on a water permeate side of each tubular membrane element; and a condenser which is arranged between said separation membrane module and said pressure-reducing means via a transmission pipe (P 3) and condenses water vapor permeating through said tubular membrane element(s) into water, wherein said dehydration system (100, 200) is configured to allow water to permeate from an outer surface to an inner surface of the membrane element(s) by bringing the aqueous organic compound into contact with the outer surface of each tubular membrane element and by reducing the pressure on the inner surface side by means of said pressure-reducing means, and characterised in that said dehydration system has at least one of the following configurations and: Configuration: said dehydration system (100, 200) comprises a temperature-maintaining means for maintaining said transmission pipe (P 3) connecting said separation membrane module and said condenser to have a temperature at which water does not condense, and Configuration: said transmission pipe (P 3) connecting said separation membrane module and said condenser is arranged downward from a permeated water outlet of said separation membrane module toward said condenser meaning any state where the condenser is positioned lower than the permeated water outlet of the separation membrane module and the transmission pipe (P 3) is connected such that it is not positioned higher than the permeated water outlet of the separation membrane module, wherein said configurations serve to inhibit backflow of condensed water generated in the transmission pipe (P 3) into the separation membrane module. Configuration: said dehydration system (100, 200) comprises a temperature-maintaining means for maintaining said transmission pipe (P 3) connecting said separation membrane module and said condenser to have a temperature at which water does not condense, and Configuration: said transmission pipe (P 3) connecting said separation membrane module and said condenser is arranged downward from a permeated water outlet of said separation membrane module toward said condenser meaning any state where the condenser is positioned lower than the permeated water outlet of the separation membrane module and the transmission pipe (P 3) is connected such that it is not positioned higher than the permeated water outlet of the separation membrane module, wherein said configurations serve to inhibit backflow of condensed water generated in the transmission pipe (P 3) into the separation membrane module.