出生於台北，14歲就讀於南門國中時期通過教育部「資賦優異生甄試」赴法。在法期間，除了音樂專業科目之外，並通過法國高中會考，進入巴黎第四大學（索邦大學）攻讀音樂學。1990年以第一名之最高榮譽獲巴黎師範音樂院「演奏家文憑」，1994年以第一獎畢業於國立高等巴黎音樂學院（CNSMP）。 

演奏足跡含括Salle Cortot, Sacre-Coeur, Theatre des Champs-Elysees, Eglise de Chaillio, Salle Art Lyrique，於Radio France的演出更由法國廣播公司錄音珍藏。旅法期間，因極佳的聲音敏銳度及技巧掌控力，經常受邀為作曲家發表新作，舉行世界首演。 

曾獲選為兩廳院「樂壇新秀」，舉行個人獨奏會。1994回國後，獲諸多樂界前輩提攜與信任，參與各式演出：1998年於介壽館與鋼琴家葉綠娜合作演出馬水龍《隨想曲》，同年與國家交響樂團協奏鍾耀光《瀟湘水澐》於國家音樂廳演出；1996、2002及2005年分別應邀赴菲律賓、韓國及泰國於「亞洲作曲家大會」演出；2006、2007、2008及2011年以獨奏及室內樂，相繼獲邀至奧地利、法國、菲律賓、中國及泰國等地演 

在臺灣合作過的樂團包含NSO國家交響樂團、國立臺灣交響樂團、世紀交響樂團、歐亞管絃樂團、新北交響樂團、陽光台北交響樂團、華岡交響樂團等 。多次赴菲律賓、韓國及泰國於「亞洲作曲家大會」演出；並以獨奏及室內樂，相繼獲邀至奧地利、法國、菲律賓、中國大陸、澳門等地演出。 

主要服務經歷為：法國LUCE國立音樂院教授、臺北市立交響樂團大提琴助理首席、國家交響樂團NSO大提琴副首席。現為臺北市立大學、北藝大教授。 

伊晴不僅在個人獨奏上精益求精、及對現代音樂有無窮的好奇心之外，她同樣熱衷室內樂、樂團的演奏，永遠試圖用更寬闊的視野，聽見每個時代的聲音。

 Yi-Ching Cheng, born in Taipei, was selected at the age of 14 by Taiwan's Ministry of Education as a gifted student and sent to France for advanced studies. In addition to her music training, she passed the French national high school exams and studied musicology at the Université Paris-Sorbonne (Paris IV). 

She graduated with highest honors from the École Normale de Musique de Paris in 1990 and earned First Prize at the Conservatoire National Supérieur de Musique de Paris (CNSMDP) in 1994. 

Her performances have taken her to renowned venues such as Salle Cortot, Théâtre des Champs-Élysées, and Radio France, where her recordings were archived by the national broadcaster. Known for her refined musical sensitivity and technical control, she was often invited to premiere contemporary works while in France. 

Returning to Taiwan in 1994, she was named a "Rising Star" by the National Theater and Concert Hall and has since collaborated with leading orchestras, including the NSO, National Taiwan Symphony Orchestra, and New Taipei Symphony Orchestra, among others. She has performed across Europe and Asia, including Austria, France, the Philippines, South Korea, Thailand, and China. 

Yi-Ching Cheng has held positions as assistant principal cellist with both the Taipei Symphony Orchestra and the NSO, and taught at the LUCE National Conservatory in France. She is currently professor at the University of Taipei and Taipei National University of the Arts. 

A passionate soloist, chamber musician, and advocate of contemporary music, she continually explores new sound worlds with curiosity and a broad artistic vision.