I visted the School of Construction of Arizona State University on July 19th and the School of Construction Management Technology of Purdue University on July 22th, gave academic lectures on "From Data to Knowledge" and "Key Technologies of BIM Applications in MEP Engineering", as well as the School of Building Construction of Georgia Institute of Technology. Through these communications, I had a better unstanding in the development status and frontiers in the informationization development of civil engineering in US. Thanks for the passional reception from Pingbo Tang, from ASU, Yi Jiang, Jiansong Zhang, Yunfeng Chen, from Purdue, and Xinyi Song, from GeorgiaTech, and other teachers and students during these days.