Tang started her singing career in the music group Cookies. When Tang started her solo singing career, her record company, EMI, wanted a change to a more grown-up look and style. A live album was released featuring songs performed at this concert.Some songs on her first album, Coloring Stephy, had a more mature and soft jazz influence than her previous music in Cookies. One was a deluxe edition which contains a DVD featuring her music videos from this album. She also did a Mandarin version of "Breaking Free" from High School Musical with Anson Hu.
In July 2009, Tang published her first romance novel, Running Alongside Me (陪著我走).
The book takes the form of a diary about a girl who has recently broken up with her lover.
She goes on a cruise and writes about the things she sees and does.
She graduated from Buddhist Sum Heung Lam Memorial College and the Hong Kong Institute of Vocational Education's Department of Fashion Design.
In 2002, she joined Hong Kong music group Cookies and became the lead singer.
She sang with Alex Fong in 「好心好報」, 「好好戀愛」, 「十分．愛(合唱版)」 (which won a Jade Solid Gold Award for the best duet in 2006), 「我的最愛」, 「重愛」,「七年」,「同屋主」and 「危城」.She also appeared on TVB's variety show Beautiful Cooking.Tang is able to speak Hakka, Cantonese and Mandarin.She also represented Hong Kong in volleyball since form 1 mainly as a left wing spiker or libero, but gave up to pursue a career in the entertainment industry. Charity Gala at Vancouver, British Columbia, Canada with many other artists.In March 2015, Tang, who became a fashion label founder/owner (Loey), got sponsorship from the shop to reassemble a women's volleyball team, with herself being a left wing spiker as well as the captain and founder of the team (she cannot become a captain as a libero), and participated in an open-grade C-class qualifications, where it got a record of a win and a loss. Tang performed her first headline solo concert, called "Stephy, See Thru Live 2007".She then led Loey to play charity matches against Chinese National Volleyball team, and had trained in Taiwan against secondary school teams in late 2015. It was held from December 7 to 9, 2007 at the Star Hall in Hong Kong.