In recent years, the demand for high-temperature thermodynamic data has been increasing due to the widespread use of phase equilibrium calculations based on the CALPHAD method and process simulations in high-temperature industries. Although drop calorimetry using an ice calorimeter is a classical technique, it remains unsurpassed in terms of accuracy and measurement efficiency, and its significance continues to be recognized. In this review, we present the experimental setup of the drop calorimeter, provide measurement examples, and highlight recent developments in the field.