A solution-providing apparatus and method of manufacturing organic light-emitting diode (OLED) display using the apparatus are disclosed. In one aspect, the apparatus comprises a storage unit, a spraying unit, a pipe, an emission-inducing unit, and a spectrometer. The storage unit is configured to store the solution that includes a light emissive material. The spraying unit is configured to spray the solution toward the substrate. The pipe interconnects the storage unit and the spraying unit. The emission-inducing unit is configured to excite the light emissive material of the solution that flows through the pipe so as to emit light from the solution. The spectrometer is configured to measure the wavelength and intensity of the light.