1938-City Hall Observatory.
9/29/1947- Opening Ceremony is held on Mid-Autumn Festival.
7/20/1960- The City Hall Observatory is moved to the newly built Yuanshan Observatory.
3/4/1969- The Executive Yuan approves the Observatory’s organizational regulations.
6/4/1978-Construction of the Planetarium begins.
7/1/1980- The Planetarium is completed, with the ceremony being presided over by Mayor Teng-hui Lee.
10/25/1985-The Observatory detects Comet Haley for the first time, and successfully photographs it.
1/16/1987- The City Urban Planning Commission reviews and passes the proposition to establish Taipei Astronomical Museum at the former drainage ditch area in Shihlin.
4/14/1988- First issue of Museum's“Almanac.”
4/1/1991-Observatory Director Chang-hsien Tsai retires. Yuan-ming Hsieh, the observatory's academic supervisor, assumes the position of acting director.
8/27/1991- Kuo-chuan Yuan serves as the Observatory's new director.
10/27/1993- Mayor Ta-chou Huang presides over the ground-breaking ceremony for the construction of Taipei Astronomical Museum.
3/12/1996-The City Council approves the organizational regulations of the new museum in its 848th meeting.
11/7/1996- Mayor Shui-bian Chen presides over the grand-opening ceremony of Taipei Astronomical Museum.
2/4/1997-The Museum partially opens.
7/20/1997-The Museum fully opens.
3/11/1999-President Teng-hui Lee and Mayor Ying-Jeou Ma visit the Museum.
5/8/2000-The Yuanshan Observatory is dismantled.
7/20/2000-Mayor Ying-Jeou Ma presides over the ET exhibition on the Museum's third anniversary.
12/18/2000-Construction of Cosmic Adventure begins.
7/20/2001-Deputy Mayor Hsiu-hsiung Bai presided over the exhibition of the Lunar Rock.
3/30/2002-The radio telescope officially opens to the public.
7/20/2002-Cosmic Adventure and Science Park open to the public.
1/2/2003-Director Kuo-chuan Yaun retires. Secretary Ching-hsiung Wang serves as the acting director.
6/2/2003-Mr. Kuo-Kuang Chiu assumes the position of director of Taipei Astronomical Museum.
7/19/2003-Mayor Ying-Jeou Ma presides over the Museum's Mars exhibition.
10/21/2003-Vice president Annette Lu and Premier Shyi-kun Yu visit the Museum during “The Approach of Mars”event.
1/16/2004-Live presentation of the Mars Rover Spirit's landing on planet Mars.
7/1/2004-Live show of Cassini entering Saturn's orbit.
7/19-25/2004-Director Chiu visits Bisei Astronomical Observatory in Japan for international exchange.
3/2/2005-Astronut Marsha S. Ivins visits Taipei Astronomical Museum.
7/17-19/2006-The TAM holds the "Host 2006 Mainland- Taiwan Junior Astronomy Summer Camp".
7/22-29/2006-Director Chiu is invited to participate in the International Planetarium Society in Melbourne, Australia.
11/9/2006- Successful image transmission of Mercury Transit from the Bisei Astronomical Observatory in Japan.
7/20/2007-The TAM's 10th anniversary .
12/22/2007-Mayor Lung-bin Hau visits the Taipei Astronomical Museum.
3/29/2008-Saturn exhibition opens.
7/22/2008- The Premier of Saint Vincent visits Taipei Astronomical Museum.
8/1/2008-Live show of Solar eclipse from Xinjiang.
8/8/2008- Dr. Ching-shan Wu, Educational Commissioner of Taipei City Government, visits Taipei Astronomical Museum.
1/18/2009-TAM hosts the events of the International Year of Astronomy.
4/24/2009- Meteorite exhibition opens.
5/2009- Dr. Ching-shan Wu, Educational Commissioner of Taipei City Government, visits the Museum during the “Night Camp at TAM” activities.
7/22/2009-Partial Solar Eclipse observation opens to the public.
9/16/2009- Mr. Tomas, chairman of the International Year of Astronomy in Austria, visits the Museum.
11/7/2009 -“From Earth to the Universe – David Malin’s Starry Night” exhibition
7/10/2010-Hosting the "Hubble Space Telescope- Two Decades Unveiling the Universe" special exhibition
9/21/2010-Jupiter at opposition
10/12/2010-Replace the chairs at the IMAX
12/31/2010-Perchase and Install the Digital Planetarium
3/12/2011-Professor Rachel Webster, the University of Melbourne, visits the Museum
6/30/2011-"Where is the Alien" special exhibition opening ceremony
7/7/2011-Digital Planetarium opening ceremony
4/2/2012-Director Kuo-Kuang Chiu retires. Ching-Hsiung Wang serves as Acting Director
4/16/2012-Saturn at Opposition
5/21/2012-Annular Solar Eclipse
6/6/2012-Transit of Venus
8/6/2012-Mars Rover Landing
12/21/2012-Dr. An-Le Chen assumes the position of director of Taipei Astronomical Museum
6/12/2013-The "Solar Storm" special exhibition
9/18/2013-The "Cosmic Adventure-Moon" special exhibition
11/14/2013-Ms.Yi-hua Lin, Educational Commissioner of Taipei City Government, visits Taipei Astronomical Museum.
4/1/2013 Ms.Yi-hua Lin, Educational Commissioner of Taipei City Government, announce "Children's Month" starts
7/8/2014 "The Story of Earth" Special Exhibition
3/23/2015-Cosmic Adventure closes for remodeling
4/4/2015-Total Lunar Eclipse
6/14/2016-Exhibit Hall closes for remodeling
7/1/2016-The "Journey To Space" Special Exhibition
11/25/2016-Cosmic Adventure re-opening
4/ 4 /2017-The "Star World" Special Exhibition