A digital information calendar displaying device comprises a displaying panel body and a digital control circuit arranged inside the displaying panel body. Wherein, the displaying panel body is provided with digital displaying windows of Gregorian calendar year, month and day, Lunar calendar month and day, days from a set date, weekdays, second, minute and hour and temperature and names of twenty-four solar terms (Jie), earthlystem time, twelve animal years and twelve constellations, at least one alarming clock indicator lamp and a plurality of control press keys in sequence. By adopting the combining displaying structure of Gregorian and Lunar calendars, solar terms (Jie), animal years, constellations and earthlystem time, etc, the utility model not only can basically substitute the current paper calendar book and bring convenience for various groups of people to know about Gregorian and Lunar calendars, solar terms (Jie), animal years, constellations and earthlystem time but also has simple structure, beautiful appearance and powerful utility.