On October 14, 2012, Dai Meng joined the first batch of SNH48 and became one of the first batch of 26 qualified candidates. On January 12, 2013, he participated in the first-term release performance of SNH48's "Give Me Power!" and made his official debut; on January 21 of the same year, he released the song "16 Sisters Song" duet with Chen Si, Gu Xiangjun and others; on February 24 of the same year On April 14th, SNH48 was invited to participate in the "Xiu Lantern Festival on the 15th day of the first lunar month in Hongkou" light show; on April 14th of the same year, he was invited to participate in Dragon TV's talent show entertainment program "The Voice of Chinese Dream" with Qian Beiting, Ding Ziyan, Gu Xiangjun and others. "Shanghai Recruitment Station, and sang the song "Endless Rotation" live. On April 22 of the same year, he released the group's first single "Storm Battle" with SNH48; on June 20 of the same year, he attended the "16th Shanghai International Competition" with SNH48 Film Festival" Japanese Film Week Welcome Dinner and served as a guest performer; on August 2 of the same year, he released the group's second EP album "Flying Start" with SNH48; on December 6 of the same year, he participated in "Dream Preparation for a Half-Mature Girl" with SNH48 "Premiere Ceremony; subsequently, his group SNH48 won the Most Potential Group Award at the "6th Music Chart Newcomer Ceremony".
On January 19, 2014, he attended the "Fortune Cookies of Love" special handshake meeting in Shanghai; in June of the same year, he went to Japan to star in NicoNico live broadcast and observe the 6th general election of AKB48; on June 18 of the same year On July 26, his group SNH48 released the MV for "Trailblazer"; on July 26 of the same year, he won the 13th place in the "SNH48 First General Election"; in October of the same year, he released the album "UZA" with SNH48.
On January 15, 2015, he released the EP "Promise of Youth" to commemorate the second anniversary of the group's debut with SNH48; on April 13 of the same year, his group SNH48 won the "Most Potential Music Chart Annual Ceremony" A new mainland group; on May 15 of the same year, they launched the group's second general election EP "The Voice of Summer" with SNH48; on July 25 of the same year, they won the 15th place in the "SNH48 Second General Election"; on October 1 of the same year , starring in the magical special photo film "Balala Little Demon Fairy: The Magic Arrow Princess" was released, in which she played Xiaolan, the guardian demon fairy of the Demon Fairy Castle. This was her first big screen movie; on October 12 of the same year On the same day, SNH48 released the group's ninth EP album "Halloween Night"; subsequently, he participated in the selection of "SNH48's First Annual Fashion Awards" and formed a small team with Xu Jiaqi, Wang Lu, Wu Zhehan, Zeng Yanfen, Zhang Yuge, and Qiu Xinyi "SNH48 Style-7 (Style-7)"; In November of the same year, he and Lin Siyi served as panel guests for the music model singing variety show "The Hidden Singer"; in December of the same year, he and 16 SNH48 members including Chen Guanhui, Qian Beiting, and Li Yuqi Members participated in Jiangsu Satellite TV's New Year's Eve concert together.
In February 2016, a set of fashion blockbusters were released with SNH48 Style-7; in March of the same year, Dai Meng went to Japan with SNH48 members Sun Rui, Qian Beiting, and Yuan Yuzhen. Participated in the recording of the Tencent Video celebrity travel reality show "Surprise Journey"; on March 25 of the same year, the group's first original EP album "Source Power" was released with SNH48, which was also SNH48's 11th EP album; in April of the same year, he participated in " "National Beautiful Girl Season 1" peak ceremony, and walked the show with members of SNH48's S team and N team.