In this paper, the development of an editing system for Hanguel sentences is described. Each Hanguel character is composed of 24basic phonemes and 1 dummy code with satisfactorily good quality, and an editing Is simply performed by using Hanguel and alphanumeric characters. The experiments demonstrate th e possibility of developing an intelligent terminal for Hanguel characters. This experimental system is implemented on the minicomputer NOVA 1200. Furthermore HIT (Hanguel -Inteuigent -Terminal) which is low cost but shows high level functions by the incorporation of a microprocessor and a CRT-display is given.