Behavioral economy is one useful and fun social subject. Behavioral economists ususally research how and why human behaviors may influence economy growth or recession, or how and why economy environment changing factor may influence human behavior changes. In my this book, I shall attempt to explain how andy why ecommerce may be one kind network human job. Also, I shall indicate reasons to explain why human network behavior may bring direct or indirect influences to economy growth or recession in our global societies in macro and micro economy view. I shall indicate cases to explain any possible human social activities may bring direct or indirect influences to cause our social economic growth or recession in consequency in possible. Global houses demand may increase or decrease in any time. The month has many houses can sell easily, but it does not represent next month houses sale number can increase. How can be one successful property seller ? What factors can influence house buyers' living need desires increase in long time? Why factors can influence house buyers' living need desires decrease in long time? I shall explain how applying economy theories solve economic problems, why does economic environment can have indirect influence to property buyers' property purchase desire.