What is the best practice when building our web page div or table?
Someone says the div is recommended, but I found it is not easy to control the size and alignment with div.
What is your opinion?
It depends entirely on what you're wanting to display:
<DIV> and <SPAN> is for page layout<Table> is for displaying tabular data (such as data points etc)The days of using <table> for whole page layouts is gone - and you should be discouraged for using them for this reason.
HTML tags are meant to be semantic. This means describing the data it contains - not how to display it (this is for stylesheets to handle)