@GEN_SHADOWCLAW
As @Indys2nd stated, you will have to purchase the game again.
Stats will not transfer, nothing will transfer from PC > PS4. You can have the accounts "linked" so both soldiers will show up on the same Battlelog. Make sure to do the steps below BEFORE you boot up the game, or it will create its own account and link it.
Here are the steps needed to link your Xbox Live Gamertag (Or PSN ID) to your Origin Account:
1. Open the Origin Client and click the "Friends" button in the top right corner (If you do not have the Origin Client downloaded, you can do so here)
2. Click "Add a Friend"
3. Inside this menu, you will see the option to connect to your Xbox Live Gamer Tag (Or PSN ID)
Good luck and see you on the Battlefield!!!