The time of Byzantium from late 9th Century to 10th Century was a time of compiling legal ,which promulgated the important legal literature "Legal Handbook","Preface","Code of Empire" and "Municipal Administration Official Law" successively and so on.

Macro economic control is necessitated by the mass production in the present world but legal means is to be used to regulate the macro economic control,so in China s market economy we need to bring the legal means into full paly in macro economic control.

According to the actual situation between power supply companies and customers,this paper puts forward strategies for recovery of electric charge under the financial crisis,and introduces some innovative measures,such as the third-party security guarantee,and many kinds of legal means to ensure recovery of electric charge.

The circular economy is new "three win" economic development mode which promotes the unite of society, economy and environment, to study the mechanism of legal regulation of circular economy is advantageous to grasp and comprehend various law measures and to guide legislation of circul.