Cheat Engine cannot run on PS3. It is a Windows/Linux/macOS memory scanner. The PS3 runs a custom Cell OS (GameOS) with a hypervisor isolating game memory.
If you're on OFW (Official Firmware): Impossible. If on CFW/HEN: Use Artemis/NetCheat at own risk (offline only). For most: Play PC version with Cheat Engine / mods.