清华大学美术学院教授、博士生导师，清华大学美术学院学术委员会委员，中国国家画院纤维艺术研究所所长，中国美术家协会壁画艺术委员会委员，中国工艺美术学会纤维艺术专业委员会会长，“从洛桑到北京”国际纤维艺术双年展策展人。
    出版专著《两色天涯——林乐成黑白画集》、《纤维艺术》。主编《国际现代纤维艺术》、《从洛桑到北京--国际纤维艺术双年展作品集》、《当代国际纤维艺术》、《国际纤维艺术》、《世界装饰图典》。
    2000年以来，先后主持完成了***纪念堂《祖国大地》大型绒绣壁画制作项目，***办公厅《山河壮丽》、《金色长城》，外交部新闻发布厅《大河奔流》，香港特别行政区签证处《玄》、《行云流水》，***外交部驻纽约和休斯敦总***《东方文明》、《文明之光》， 微软亚洲研究院《天籁之声》，IBM中国创新研究院《彩云追月》，清华大学美术学院教学楼《山高水长》等百余项大型纤维艺术应用课题的研究。

　　Professor, doctoral supervisor, Academy of Arts and Design, Tsinghua University, Director, Fiber Art Institute, Secretary-general, China Craft& Art Association Fiber Art Committee, Designer, “From Lausanne to Beijing” International Fiber Art Biennale, Judge, the 5th China Craft& Art Masters, Judge, “Lan”&Blissliving Home Global Design Competition. “Spring, Summer, Autumn and Winter”, one of his representative works, is honored the silver prize in the 9th National Art Works Exhibition. “Day and Night” and “High Mountain and Long River” are granted excellent prize in the “Arts and Science” International Works Exhibition. “Metaphysics” is awarded in the 1st National Mural Exhibition. Such monographs as “The Land Scenery--- Lin Lecheng’s Black and White Decoration Painting Collection”, “Modern Art Design--- Fiber Art”, and “Fiber Art---Universal Design Textbook of College Students” are published. He also edited “International Modern Fiber Art”, “‘From Lausanne to Beijing’ International Fiber Art Biennale Catalogue”, “Contemporary International Fiber Art”, “International Fiber Art” and “World Decoration Painting”. He was in charge of the grand project of Wool Embroidery Mural titled Homeland in Chairman Mao Memorial Hall since 2000. Other fiber art projects, “Life” in Kaichen Square in Beijing, “Sounds of Nature” of Asia Fiber Art Institute, and “Colorful Clouds Chasing Moon” of IBM Innovation Institute in China, “High Mountain and Long River” of teaching building of Academy of Arts and Design in Tsinghua University, and “Metaphysics”, “Rack and Flowing Water”, “Midnight” of visa section in Hongkong Special Administrative Region are designed and created by him.