The present invention relates to a livestock manure joint-resource facility odor-measurement and deodorization-system efficiency evaluation device which forms a manure input section in one space of the facility (10), provides a treatment facility in the opposite space to process the manure transferred from the input section, installs a converging section having a downward-inclined upper portion to concentrate dust and gases generated from the input section and the treatment facility toward a deodorization system, includes a sensing unit at the top of the converging section to detect the discharge volume of the dust and gases entering through the converging section, employs a deodorization system comprising a collection fan that inhales dust and gases and a spraying unit which injects deodorizing agents into the flowing gas so as to collect and deodorize the dust and gases generated in the treatment facility, includes a first detection unit installed in the converging section to withdraw part of the dust and gases and guide them to a measuring unit and a second detection unit connected to the exhaust pipe of the deodorization system to detect part of the collected and deodorized gas and guide it to the measuring unit, comprises a measuring unit that evaporates moisture in each gas stream, removes dust and foreign matter, cools the gas, measures gas flow rate, and senses concentrations of ammonia and hydrogen sulfide, and further includes a terminal unit that determines whether the deodorization system operates normally by comparing the ammonia and hydrogen sulfide concentrations sensed in the converging section and the deodorization exhaust pipe with the gas flow rate detected by the sensing unit, wherein the first and second detection units are connected to the measuring unit through separate pipes linked to individual flow tubes (h) so that each gas stream flows separately inside the measuring unit and each measurement value is individually transmitted to the terminal, and wherein the measuring unit comprises a heating element that heats gases from the first and second detection units to vaporize and remove moisture, a collection element that removes dust and foreign substances, a cooling element that condenses and cools the cleaned gases, multiple valve units consisting of solenoid valves that guide the cooled gases to a flow-rate element which regulates inflow and supplies gas to a sensor unit that detects ammonia or hydrogen sulfide, and wherein the efficiency-evaluation and deodorization-system control method using said device comprises steps of transmitting to the terminal the amount of dust and gas detected by the sensing unit in the converging section (S10), guiding part of the dust and gases detected by the first detection unit to the measuring unit (S20), guiding part of the gas collected by the deodorization system via the second detection unit to the measuring unit (S30), removing dust and foreign matter from the gases of the first and second detection units and measuring their ammonia and hydrogen sulfide concentrations and flow rates in the measuring unit (S40), transmitting said measurements to the terminal to verify normal operation of the deodorization system by comparing the ammonia and hydrogen sulfide concentrations and flow rates with the gas flow detected by the sensing unit (S50), and, upon confirming normal operation, controlling the operation of the deodorization system by adjusting the speed of the collection fan and the injection amount of the deodorizing agent to reduce resource consumption (S60), wherein the step of measurement (S40) includes heating the gases to vaporize moisture, removing dust and foreign matter via the collection element, condensing and cooling the gases via the cooling element, regulating gas flow and separating the gas streams through the valve units, and detecting ammonia and hydrogen sulfide through the sensor element, and wherein the step of verifying normal operation (S50) includes displaying, via the terminal display, the concentrations and flow rates detected in the converging section and the deodorization exhaust pipe, comparing deodorization efficiency before and after treatment, and wherein the step of reducing resource consumption (S60) includes adjusting the collection fan speed and deodorizing-agent injection according to the deodorization efficiency displayed on the terminal so that operating intensity increases or decreases depending on gas volume and ammonia and hydrogen-sulfide concentrations, thus enabling easy confirmation of deodorization efficiency and automatic control of the collection fan and spraying unit to reduce consumed resources.