The architecture industry in Vietnam is increasingly playing an active role in the urbanization period. Cities require the role of chief architect, but in planning the chief architect is often behind the manager role. The combination of ancient architecture and modern architecture also creates inadequacies between heritage, migration and new life. While high-rise buildings are still being built continuously, the infrastructure is not adapted to them. These things lead to traffic congestion, urban environment pollution; narrowing agricultural land and habitat in villages; The concentration of the population in the city due to underemployment ... The establishment of systems theory about architecture is very necessary. In this book, the author has analyzed two important generalized issues: 1. Urban and the challenges of change; 2. Preserving urban and architectural heritage.