The project, which was approved by the mayor of London this month, involves the creation of four "villages" and a "high street".
Developer EC Properties has revealed that half of the 31ha being redeveloped over the next 20 years will be dedicated to open space, including a garden square, play areas and a park.
The Lost River Park will run along the original course of Counter's Creek - an ancient tributary of the Thames that once flowed through Earls Court.
A representative for EC Properties said: "The design philosophy has been to capture the best of London. These proposals include open spaces typical of this sophisticated part of the city."
Other features will include tree-lined streets connecting the public gardens, a 2.5km jogging and walking route, green roofs and living walls, and food gardens to inspire people to grow their own.
An exact date for the development of the open spaces has not yet been announced. However, work on the Lost River Park belongs to phase five of the seven-phase Earls Court Project.