The increase in the population of the planet and the rapid economic growth and, consequently, the high consumption of energy has created many environmental problems. Due to these reasons and the lack of renewability of these fossil fuels, there has been a steep trend towards the production of renewable fuels, one of which is the production of energy from biomass. In this study, biofuel production from biomass has been investigated using the pyrolysis method, a method that reduces the production of oil from millions of years to a few seconds, and is the most industrialized thermochemical method for producing fuel from biomass. This research focuses on thermochemical processes, pyrolysis principles, hydrothermal methods and specifications, chemical composition and applications of biofuels, and the devices and equipment needed for it. It is found from this study that producing of biofuel from biomass with pyrolysis process has to solve some problems such as size of pyrolysis plant and type of feedstock. These studies suggested more economical study for producing of biofuel from pyrolysis process and also mix feedstock to increasing production quality and test some new catalyst for Upgrading of biofuel.