A liquid discharge device includes a case receiving a cartridge having a first liquid chamber, a tank having a second liquid chamber, a head, a liquid level sensor, an interface, an alarm and a controller configured to: when the cartridge is installed in the case, read a liquid amount Vc stored in the first liquid chamber from a cartridge memory through the interface; read a liquid amount Vs stored in the second liquid chamber from a memory; calculate a threshold based on the liquid amount Vc read from the cartridge memory and the liquid amount Vs read from the memory; update a count value with a value equivalent to an amount of liquid instructed to be discharged by a discharge instruction; and operate the alarm when the updated count value reaches the threshold.