diff --git a/contracts/DODODrops/DODODropsV2/DODODrops.sol b/contracts/DODODrops/DODODropsV2/DODODrops.sol
index 5c57c82..47d73fd 100644
--- a/contracts/DODODrops/DODODropsV2/DODODrops.sol
+++ b/contracts/DODODrops/DODODropsV2/DODODrops.sol
@@ -73,6 +73,7 @@ contract DODODrops is InitializableMintableERC20, ReentrancyGuard {
     event ChangeRedeemTime(uint256 redeemTime);
     event ChangeTicketUnit(uint256 newTicketUnit);
     event Withdraw(address account, uint256 amount);
+    event SetReveal();
 
     event SetSellingInfo();
     event SetProbInfo(); // only for ProbMode
@@ -226,6 +227,7 @@ contract DODODrops is InitializableMintableERC20, ReentrancyGuard {
     function setRevealRn() external onlyOwner {
         require(_REVEAL_RN_ == 0, "ALREADY_SET");
         _REVEAL_RN_ = uint256(keccak256(abi.encodePacked(blockhash(block.number - 1))));
+        emit SetReveal();
     }
     
     function setSellingInfo(uint256[] memory sellingTimeIntervals, uint256[] memory prices, uint256[] memory amounts) external notStart() onlyOwner {
diff --git a/contracts/DODODrops/DODODropsV2/DropsFeeModel.sol b/contracts/DODODrops/DODODropsV2/DropsFeeModel.sol
index 817e655..de48477 100644
--- a/contracts/DODODrops/DODODropsV2/DropsFeeModel.sol
+++ b/contracts/DODODrops/DODODropsV2/DropsFeeModel.sol
@@ -31,6 +31,11 @@ contract DropsFeeModel is InitializableOwnable {
 
     mapping(address => DropBoxInfo) dropBoxes;
 
+    // ============ Event =============
+    event AddDropBoxInfo(address dropBox, uint256 globalFee, address feeAddr, address priceAddr);
+    event SetDropBoxInfo(address dropBox, uint256 globalFee, address feeAddr, address priceAddr);
+
+
     function addDropBoxInfo(address dropBox, uint256 globalFee, address feeAddr, address priceAddr) external onlyOwner {
         DropBoxInfo memory dropBoxInfo =  DropBoxInfo({
             isSet: true,
@@ -39,6 +44,7 @@ contract DropsFeeModel is InitializableOwnable {
             priceAddr: priceAddr
         });
         dropBoxes[dropBox] = dropBoxInfo;
+        emit AddDropBoxInfo(dropBox, globalFee, feeAddr, priceAddr);
     }
 
     function setDropBoxInfo(address dropBox, uint256 globalFee, address feeAddr, address priceAddr) external onlyOwner {
@@ -46,6 +52,7 @@ contract DropsFeeModel is InitializableOwnable {
         dropBoxes[dropBox].globalFee = globalFee;
         dropBoxes[dropBox].feeAddr = feeAddr;
         dropBoxes[dropBox].priceAddr = priceAddr;
+        emit SetDropBoxInfo(dropBox, globalFee, feeAddr, priceAddr);
     }
 
     function getPayAmount(address dropBox, address user, uint256 originalPrice, uint256 ticketAmount) external view returns (uint256 payAmount, uint256 feeAmount) {