A fuel consumption measurement system of a work vehicle, comprising: a first fuel data calculation unit configured to calculate first fuel data related to fuel consumption, based on a fuel injection amount injected to an engine; a second fuel data calculation unit configured to calculate second fuel data related to fuel consumption, based on a change amount of a fuel amount in a fuel tank; a correction coefficient calculation unit configured to calculate a correction coefficient based on the first fuel data and the second fuel data; a correction coefficient determination unit configured to determine whether the correction coefficient falls within a prescribed range; a fuel consumption data calculation unit configured to calculate fuel consumption data indicating a fuel consumption rate, based on the correction coefficient determined to fall within the prescribed range, and the first fuel data; a travel condition determination unit configured to determine whether a work vehicle satisfies a prescribed travel condition, wherein the second fuel data calculation unit is configured to calculate the second fuel data based on a change amount of a fuel amount in the fuel tank that has been acquired when the work vehicle satisfies the travel condition, wherein the travel condition includes a state in which travel speed of the work vehicle is equal to or smaller than a speed threshold has continued for a prescribed time; and a correction coefficient storage unit configured to store the correction coefficient determined to fall within the prescribed range, wherein when it is determined that the correction coefficient calculated by the correction coefficient calculation unit does not fall within a prescribed range, the fuel consumption data calculation unit calculates the fuel consumption data based on the correction coefficient stored in the correction coefficient storage unit, and the first fuel data. a first fuel data calculation unit configured to calculate first fuel data related to fuel consumption, based on a fuel injection amount injected to an engine; a second fuel data calculation unit configured to calculate second fuel data related to fuel consumption, based on a change amount of a fuel amount in a fuel tank; a correction coefficient calculation unit configured to calculate a correction coefficient based on the first fuel data and the second fuel data; a correction coefficient determination unit configured to determine whether the correction coefficient falls within a prescribed range; a fuel consumption data calculation unit configured to calculate fuel consumption data indicating a fuel consumption rate, based on the correction coefficient determined to fall within the prescribed range, and the first fuel data; a travel condition determination unit configured to determine whether a work vehicle satisfies a prescribed travel condition, wherein the second fuel data calculation unit is configured to calculate the second fuel data based on a change amount of a fuel amount in the fuel tank that has been acquired when the work vehicle satisfies the travel condition, wherein the travel condition includes a state in which travel speed of the work vehicle is equal to or smaller than a speed threshold has continued for a prescribed time; and a correction coefficient storage unit configured to store the correction coefficient determined to fall within the prescribed range, wherein when it is determined that the correction coefficient calculated by the correction coefficient calculation unit does not fall within a prescribed range, the fuel consumption data calculation unit calculates the fuel consumption data based on the correction coefficient stored in the correction coefficient storage unit, and the first fuel data.