A light-emitting device is disclosed. The light-emitting device includes a light-emitting element, a driving circuit, and a compensation unit. The driving circuit is coupled to the light-emitting element, and is configured to receive a first data signal, drive the light-emitting element, and output a sensing signal. The compensation unit is coupled to the driving circuit, and is configured to receive the sensing signal and compensate the first data signal. The compensation unit includes a first comparator circuit and a second comparator circuit. The first comparator circuit includes a first addition terminal, a first subtraction terminal, and a first output terminal. The second comparator circuit includes a second addition terminal and a second subtraction terminal. The first subtraction terminal receives the sensing signal. The first output terminal is coupled to the second addition terminal.