It　was　challenging　to　enhance　the　catalytic　activity　and　water　resistance　of　transition　metal　oxides　in　the　CH　4　treatment　process.　Here,　La　with　large　atomic　radii　was　doped　onto　Co　3　O　4　on　the　(1　1　0),　(1　1　1)　and　(100)　crystal　facets,　respectively,　and　successfully　doped　into　the　(1　1　0)　and　(100)　lattices,　but　accumulation　occurs　on　the　(1　1　1)　crystal　surface.　Doping　La　into　the　Co　3　O　4　lattice　achieved　a　dual　excitation　effect　for　surface　optimization　and　structural　defects,　causing　lattice　expansion,　enhancing　the　electrophilicity　of　the　O　atoms　in　the　vicinity　of　La,　and　significantly　stimulating　the　Co-O　bond.　This　significantly　improved　reactive　oxygen　species　content,　CH　4　adsorption　capacity,　and　gaseous　oxygen　activation　and　replenishment　capability　for　higher　catalytic　activity.　Conversely,　the　(1　1　1)　facet　with　accumulated　La　showed　an　opposite　trend.　Meanwhile,　La　doping　effectively　improved　the　stability　of　Co　3　O　4　and　weakened　its　hydrophilicity,　which　effectively　enhanced　its　water　resistance.　This　research　provided　a　viable　strategy　for　designing　high-performance　and　water-resistant　Co　3　O　4-based　catalysts.